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Best Psychologists in Frederick, MD (2026)

35 psychologists ranked by RP ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Frederick: Donald A. Carlson Jr, PH, RP Score 74/100; 5.0★ from 3 Google reviews.

  2. 22

    Most-reviewed: Medpsych Health Services, 135 Google reviews at 3.8★, the most of 35 ranked; ranked #22.

Rankings can't be bought. Psychologists can't pay to change their rank or score. How we rank

35 Frederick psychologists are ranked here by RP Score, from eight published factors. 6 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.4★ across 35 rated practices.

Top 10 psychologists in Frederick at a glance

Ranked by the RP Score from public listing data, not by treatment outcomes; Sponsored placements are shown separately and never change rank.

Top 10 psychologists in Frederick at a glance
RankBusinessRP ScoreGoogle ratingBased inHoursBest for
1Donald A. Carlson Jr, PH745.0★ (3)Frederick—Overall
2Daniel L. Haffey, PsyD743.7★ (3)Frederick——
3Sarabjit K. Singh M.D.743.0★ (4)Frederick——
4Dr. Heather Hunt732.3★ (3)Frederick——
5Snyder Rebecca L732.3★ (3)Frederick——
6Robert F. Mannis, Ph.D735.0★ (13)FrederickSat—
7Melanie Sholtis, Psy.D.695.0★ (6)Frederick——
8Playful Therapy Connections694.0★ (7)FrederickEvenings—
9Dr. Laura Brosbe683.0★ (6)Frederick——
10Peaceful Mind Healing683.3★ (7)FrederickEvenings—

The 35 best psychologists in Frederick, ranked

Ordered by RP Score, a 0–100 score from eight published factors. Paid placement never changes the order.

Ranked by the RP Score from public listing data, not by treatment outcomes; Sponsored placements are shown separately and never change rank.

  1. Ranked #1 in Frederick

    #1 Donald A. Carlson Jr, PH

    Based in Frederick

    74/100RP Score

    Ranked #1 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 5.0★ from 3 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 5.0★ from 3 Google reviews
    Address
    22 E 2nd St, Frederick, MD 21701
    View profile for Donald A. Carlson Jr, PH(240) 344-4119

  2. #2 Daniel L. Haffey, PsyD

    Based in Frederick

    74/100RP Score

    Ranked #2 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 3.7★ from 3 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 3.7★ from 3 Google reviews
    Address
    65 Thomas Johnson Dr, Frederick, MD 21702
    View profile for Daniel L. Haffey, PsyD(301) 695-9693

  3. #3 Sarabjit K. Singh M.D.

    Based in Frederick

    74/100RP Score

    Ranked #3 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 3.0★ from 4 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 3.0★ from 4 Google reviews
    Address
    7101 Guilford Dr #100, Frederick, MD 21704
    View profile for Sarabjit K. Singh M.D.(240) 464-8000

  4. #4 Dr. Heather Hunt

    Based in Frederick

    73/100RP Score

    Ranked #4 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 2.3★ from 3 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 2.3★ from 3 Google reviews
    Address
    5 N Bentz St, Frederick, MD 21701
    View profile for Dr. Heather Hunt(240) 575-5216

  5. #5 Snyder Rebecca L

    Based in Frederick

    73/100RP Score

    Ranked #5 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 2.3★ from 3 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 2.3★ from 3 Google reviews
    Address
    65 Thomas Johnson Dr, Frederick, MD 21702
    View profile for Snyder Rebecca L(301) 682-6639

  6. #6 Robert F. Mannis, Ph.D

    Based in Frederick

    73/100RP Score

    Ranked #6 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 5.0★ from 13 Google reviews.

    Based on 7 of 8 factors; recency not yet collected.

    • 5.0★ from 13 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat 9 AM–5 PM · Sun closed
    Address
    235 W Patrick St, Frederick, MD 21701
    View profile for Robert F. Mannis, Ph.D(301) 662-4160

  7. #7 Melanie Sholtis, Psy.D.

    Based in Frederick

    69/100RP Score

    Ranked #7 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 5.0★ from 6 Google reviews.

    Based on 7 of 8 factors; recency not yet collected.

    • 5.0★ from 6 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    Address
    106 N Court St, Frederick, MD 21701
    View profile for Melanie Sholtis, Psy.D.(240) 210-9003

  8. #8 Playful Therapy Connections

    Based in Frederick

    69/100RP Score

    Ranked #8 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 4.0★ from 7 Google reviews.

    Based on 7 of 8 factors; recency not yet collected.

    • 4.0★ from 7 Google reviews
    Hours
    Mon–Thu 9 AM–7 PM · Fri 9 AM–12 PM · Sat–Sun closed
    Address
    10 N Jefferson St Unit 203, Frederick, MD 21701
    View profile for Playful Therapy Connections(202) 750-1028

  9. #9 Dr. Laura Brosbe

    Based in Frederick

    68/100RP Score

    Ranked #9 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 3.0★ from 6 Google reviews.

    Based on 7 of 8 factors; recency not yet collected.

    • 3.0★ from 6 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    196 Thomas Johnson Dr #120, Frederick, MD 21702
    View profile for Dr. Laura Brosbe(240) 566-3130

  10. #10 Peaceful Mind Healing

    Based in Frederick

    68/100RP Score

    Ranked #10 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 3.3★ from 7 Google reviews.

    Based on 7 of 8 factors; recency not yet collected.

    • 3.3★ from 7 Google reviews
    Hours
    Mon–Tue 11 AM–7 PM · Wed closed · Thu 11 AM–7 PM · Fri 11 AM–5 PM · Sat–Sun closed
    Address
    5301 Buckeystown Pike Ste 440, Frederick, MD 21704
    View profile for Peaceful Mind Healing(240) 651-3890

  14. #14 Zen Psychological Center

    Based in Frederick

    62/100RP Score

    Ranked #14 because of its Google rating and specialty focus: 4.4★ from 20 Google reviews, listed on Google as “Psychotherapist”.

    Based on 7 of 8 factors; recency not yet collected.

    • 4.4★ from 20 Google reviews
    Hours
    Mon–Fri 9 AM–5 PM · Sat–Sun closed
    Address
    11 Byte Ct, Frederick, MD 21702
    View profile for Zen Psychological Center(301) 246-0206

  20. #20 Rajeev Warrier Psy D

    Based in Germantown, 18 mi away

    58/100RP Score

    Ranked #20 because of specialty focus and its Google rating: listed on Google as “Psychologist”, 4.7★ from 3 Google reviews.

    Based on 6 of 8 factors; recency and availability not yet collected.

    • 4.7★ from 3 Google reviews
    Address
    12850 Middlebrook Road Ste 201, Germantown, MD 20874
    View profile for Rajeev Warrier Psy D(301) 525-1925

  22. #22 Medpsych Health Services

    Based in Frederick

    57/100RP Score

    Ranked #22 because of its Google rating and proximity: 3.8★ from 135 Google reviews, based in Frederick.

    Based on 7 of 8 factors; recency not yet collected.

    • 3.8★ from 135 Google reviews
    Hours
    Mon–Thu 8:30 AM–6 PM · Fri 8:30 AM–5 PM · Sat–Sun closed
    Address
    7101 Guilford Dr #100, Frederick, MD 21704
    View profile for Medpsych Health Services(240) 464-8000

  23. #23 Dr. Allan L. Levy, MD

    Based in Frederick

    56/100RP Score

    Ranked #23 because of its Google rating and proximity: 3.8★ from 47 Google reviews, based in Frederick.

    Based on 7 of 8 factors; recency not yet collected.

    • 3.8★ from 47 Google reviews
    Hours
    Mon–Fri 9 AM–4:30 PM · Sat–Sun closed
    Address
    172 Thomas Johnson Dr #204, Frederick, MD 21702
    View profile for Dr. Allan L. Levy, MD(301) 663-8343

All 35 psychologists

#1 to #25 are shown in full above. Here are #26 to #35, in RP Score order; each links to its profile.

psychologists in Frederick, ranks 26 to 35
RankBusinessRP ScoreGoogle ratingDistance
26Ally Behavior Centers555.0★ (4)In Frederick
27Maryland Neuropsychological Services, LLC552.3★ (3)17 mi
28Catoctin Counseling Center Inc.552.6★ (10)In Frederick
29Monocacy Neurodevelopmental553.0★ (7)In Frederick
30The Levy Center For Mind-Body Medicine Gaithersburg554.6★ (11)20 mi
31Thriveworks Counseling & Psychiatry Germantown524.6★ (103)18 mi
32Excel Psychiatric Consultation444.3★ (48)18 mi
33Carroll Counseling of Maryland432.4★ (17)14 mi
34Acorn Health ABA Therapy - Germantown425.0★ (5)19 mi
35Safe Harbor Behavioral Care of Gaithersburg415.0★ (4)19 mi

Also serving Frederick

20 more psychologists within 20 mi that we can't rank yet: too few reviews, or a specialty we couldn't confirm. Listed A to Z.

Unranked psychologists serving Frederick
BusinessGoogle ratingDistance
Back 2 Basics Pediatric Therapy Services4.8★ (93)In Frederick
Breakthrough Counseling Services3.3★ (39)In Frederick
Brook Lane Frederick Outpatient2.4★ (58)In Frederick
Brooks Behavioral Health Services, LLC5.0★ (32)In Frederick
Clearview Communities LLC3.7★ (19)In Frederick
Dagenhart Health and Wellness, LLC3.0★ (43)In Frederick
Indigo Bloom Counseling5.0★ (18)In Frederick
Katie Frazee, LCPC, NCC - Guiding Paths Counseling - Frederick, MD4.8★ (17)In Frederick
Kema Health Services - Psychiatric Mental Health Nurse Practitioner4.6★ (50)In Frederick
Lake Linganore Psychiatry4.5★ (31)In Frederick
Lifespan Behavioral Health Services4.5★ (250)In Frederick
Mary Ellen Shea, LCPC5.0★ (16)In Frederick
Maryland Wellness and Psychiatry LLC4.9★ (244)In Frederick
MRB Counseling Services Inc4.2★ (26)In Frederick
Paraview Behavioral Health4.5★ (19)In Frederick
Peace Of Mind Therapeutic Services & Solutions, LLC4.6★ (14)In Frederick
Revive & Thrive Mental Wellness4.6★ (32)In Frederick
Sage Mental Wellness4.8★ (23)In Frederick
SOL Mental Health Frederick Downtown Clinic3.4★ (27)In Frederick
Trauma Specialists of Maryland, LLC3.2★ (21)In Frederick

How we ranked Frederick psychologists

We scored 35 Frederick psychologists on eight factors, weighted as shown. A practice is ranked when its specialty is confirmed and it has 3 or more Google reviews or a claimed profile. A practice with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 9, 2026.

Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

RP Score factors and weights
FactorWeightComputed fromIn Frederick data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Review volume5%Number of Google reviews, compared with the most-reviewed practice on the listMeasured
Recency5%Share of Google reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, and round-the-clock or same-day availabilityMeasured
Specialty focus25%How clearly the practice does this specialty (its Google category and name)Measured
Proximity15%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The practice has claimed its Ranked Psychologists profile (free or paid earn the same)Measured
Partnered5%The practice links to Ranked Psychologists from its own website with our badge, checked periodicallyMeasured

How to choose a psychologist

  1. Check the license with the state or provincial board that issued it; most boards publish a free online lookup.
  2. Make sure they regularly work with clients who have your concern, and ask what approach they use and why.
  3. If you may need testing as well as therapy (for example for ADHD or memory concerns), ask whether the practice does assessments itself.
  4. Ask about fees, insurance and the cancellation policy before the first session. In the US, if you are uninsured or paying yourself, you can ask for a good faith estimate of expected charges.
  5. Check practical fit: in-person or online sessions, evening times, and how soon they have an opening.
  6. After a few sessions, ask yourself whether you feel heard. Changing to a different provider is common and fine.

Questions to ask a psychologist

  • Are you accepting new clients, and how soon could I start?
  • Which license do you hold, and in which state or province?
  • How often do you work with concerns like mine?
  • Do you offer psychological testing, or therapy only?
  • What do you charge per session, and do you take my insurance or provide a superbill?
  • Do you offer online sessions?
  • What is your cancellation policy?
  • What do you keep confidential, and when would you have to share information?

Terms explained

PhD / PsyD
Doctoral degrees in psychology. A PhD usually has a stronger research focus, a PsyD a stronger clinical focus; both can lead to a psychologist license.
Licensed psychologist
A person licensed by a state or provincial psychology board to practice psychology. The title is protected by law.
Psychological associate
In some states and provinces, a master’s-level practitioner licensed or registered by the psychology board, often with supervision requirements.
LPC / LMHC / LCPC
US licenses for professional or mental health counselors (the name differs by state). They provide counseling and therapy.
LCSW
Licensed clinical social worker: a master’s-level social worker licensed to provide therapy.
LMFT
Licensed marriage and family therapist: licensed to treat individuals, couples and families with a focus on relationships.
RP / RCC
Registered psychotherapist (Ontario) and registered clinical counsellor (British Columbia): Canadian titles for licensed therapy providers.
PSYPACT
An interstate agreement that lets psychologists licensed in a member state provide telepsychology to clients in other member states once they hold the required authorization.
Telehealth
Sessions held by secure video or phone instead of in person. The provider generally needs to be licensed where the client is located.
CBT
Cognitive behavioral therapy: a structured talk therapy that works on the links between thoughts, feelings and behavior.
DBT
Dialectical behavior therapy: a form of CBT that teaches skills for managing intense emotions and relationships.
ERP
Exposure and response prevention: a form of CBT used for OCD.

Psychologists in Frederick: frequently asked questions

Who is the best psychologist in Frederick?

By RP Score, the highest-ranked psychologist in Frederick, MD is Donald A. Carlson Jr, PH with an RP Score of 74/100. It has 5.0★ from 3 Google reviews. Daniel L. Haffey, PsyD (#2) and Sarabjit K. Singh M.D. (#3) follow. We ranked 35 psychologists on eight factors, last updated November 9, 2026.

How many psychologists are there in Frederick?

RankedPsychologists ranks 35 psychologists serving Frederick, MD. 26 of them are based in Frederick; the rest serve it from nearby towns. Another 20 within 20 mi are listed but not ranked yet. Counts are as of November 2026.

What should I do if I need help right now?

In crisis or thinking about suicide? Call or text 988 (US and Canada), any time. In an emergency, call 911. This site cannot help in an emergency.

Which psychologists in Frederick work on weekends?

6 of 35 ranked psychologists post Saturday hours and 3 post Sunday hours. The highest-ranked open Saturdays are Robert F. Mannis, Ph.D (#6), Thriveworks Counseling & Psychiatry Frederick (#11) and Kindred Tree Healing Center (#12). Posted hours are office hours; many practices also offer evening or online sessions by appointment.

What Google rating do Frederick psychologists have?

The median Google rating among 35 rated psychologists in Frederick is 4.4★, with a median of 7 reviews. Medpsych Health Services has the most, 135 reviews, and ranks #22. We adjust ratings for review count, so a few five-star reviews cannot top the list.

How does RankedPsychologists rank psychologists?

Each psychologist gets a 0–100 RP Score from eight published factors, led by reputation (25%), specialty focus (25%), proximity (15%) and availability (10%). A practice with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only practices with a confirmed specialty and 3 or more reviews, or a claimed profile, are ranked.

Do psychologists outside Frederick count in this ranking?

Yes, if they are within 20 mi of the Frederick city center, our service radius for psychologists. Each listing shows where the practice is based and how far away it is. Proximity is 15% of the RP Score, so a nearby practice gets a small edge.

Can psychologists pay to rank higher on RankedPsychologists?

No. The RP Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured practices may appear above the list, labelled Sponsored and showing their honest rank.

How are psychologists in Frederick ranked?

Each practice gets an RP Score from 0 to 100 from 8 published factors, including its Google rating, how clearly it focuses on psychology and how close it is. Sponsored placements are shown separately and never change rank. The score does not measure treatment outcomes.

What is the difference between a psychologist and a therapist?

“Psychologist” is a protected title: only people licensed by a state or provincial psychology board may use it. Most hold a doctorate (PhD or PsyD) and are trained in psychological testing as well as therapy. “Therapist” is a general word: licensed counselors, clinical social workers and marriage and family therapists also provide therapy under their own licenses.

Can I see a psychologist online?

Often, yes. Licensing generally follows where you are during the session, so the provider needs to be licensed or authorized there. In the US, psychologists in PSYPACT member states can offer telepsychology to clients in other member states; counselors and social workers have their own rules. In Canada, ask whether the provider is registered in your province.

What if I need help right now?

Do not wait for a consultation. Call or text 988 (US and Canada) if you are in crisis or thinking about suicide, at any time. In an emergency, call 911.

Update log for Frederick

  1. November 2026: RP Scores recalculated for 35 psychologists serving Frederick.

More psychologists and Frederick pages