NPI registry status
Active
2026 NPPES data Clinical Psychologist NPI 1013191279 PH.D., M.P.
Verify on CMS → Caroline Williams, PH.D., M.P.
Clinical Psychologist in Fort Sam Houston, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 63,000 in Clinical Psychologist, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
258
Medicare Part D claims · 28 beneficiaries · Clinical Psychologist avg: 615
What the federal data shows
Caroline Williams, PH.D., M.P. filed 258 Medicare Part D claims in 2023 as a Clinical Psychologist in Fort Sam Houston, Texas.
- 258
- Part D claims, 2023
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Caroline Williams, PH.D., M.P.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
258 49th percentile higher than 49% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Caroline Williams, PH.D., M.P.?
Quality data not reportedPrimary specialty
Clinical Psychologist
Medicare Part D claims
258 58% vs specialty avg
Specialty distribution in Texas
How Clinical Psychologist compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Clinical Psychologist. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Caroline Williams, PH.D., M.P. appears in the CMS NPPES registry as a Clinical Psychologist provider holding PH.D., M.P. credentials at BROOKE ARMY MEDICAL CENTER, Fort Sam Houston, TX, 78234, with a listed phone of (706) 304-3010. NPI 1013191279 was issued on 12/24/2007.
Medicare Part D records for calendar year 2023 show 258 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $19K in drug spend.
Clinical Psychologist is a high-volume specialty nationwide, with 63,000 enrolled providers across 56 states and an average of 615 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1013191279 |
|---|---|
| Specialty | Clinical Psychologist |
| Credentials | PH.D., M.P. |
| Gender | Female |
| NPI Issued | 12/24/2007 |
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Caroline Williams, PH.D., M.P.. To verify Caroline Williams, PH.D., M.P.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
258
Total Claims
$19K
Total Drug Cost
28
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 592
- Total Day Supply
- 17,642
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 63.3 years
- Avg HCC Risk Score
- 0.68
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| NPPES-Specialty Amitriptyline Hcl | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Clinical Psychologist Overview
How Caroline Williams, PH.D., M.P. fits within the Clinical Psychologist landscape nationally.
63,000
Clinical Psychologist Providers in US
56
States with Clinical Psychologist
615
Avg Claims per Provider
Caroline Williams, PH.D., M.P.'s 258 claims are below the specialty average of 615.
Nearby Clinical Psychologist Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Williams.
Dr. Alice Abbott
PHD
Houston, TX
Dr. Lubnaa Abdullah
LP
Edinburg, TX
Dr. Bruce Abel
PH.D
Plano, TX
Dr. Marvin Abney
PH.D.
San Antonio, TX
Dr. Diana Abraham
PSYD
Houston, TX
Compare Clinical Psychologist nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Clinical Psychologist peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Medical Specialties Explained
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Frequently Asked Questions
What is Caroline Williams, PH.D., M.P.'s specialty? ▼
Caroline Williams, PH.D., M.P. specializes in Clinical Psychologist and practices in Fort Sam Houston, Texas. Credentials: PH.D., M.P..
How much does Caroline Williams, PH.D., M.P. prescribe under Medicare Part D? ▼
In 2023, Caroline Williams, PH.D., M.P. wrote 258 Medicare Part D claims totaling $19K in drug costs for 28 beneficiaries.
Where is Caroline Williams, PH.D., M.P. located? ▼
Caroline Williams, PH.D., M.P. is located at BROOKE ARMY MEDICAL CENTER, Fort Sam Houston, TX, 78234. Phone: (706) 304-3010.
What is Caroline Williams, PH.D., M.P.'s NPI number? ▼
Caroline Williams, PH.D., M.P.'s National Provider Identifier (NPI) is 1013191279, issued on 12/24/2007.
How many Clinical Psychologist providers are there in the US? ▼
There are 63,000 Clinical Psychologist providers across 56 states in the US. The average Clinical Psychologist provider writes 615 Medicare Part D claims per year.
What drugs does Caroline Williams, PH.D., M.P. prescribe most often? ▼
Based on 2023 Medicare Part D data, Caroline Williams, PH.D., M.P.'s most frequently prescribed drugs include NPPES-Specialty. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Caroline Williams, PH.D., M.P. accept Medicare? ▼
Caroline Williams, PH.D., M.P. appears in CMS Medicare data with 258 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Caroline Williams, PH.D., M.P.'s credentials? ▼
Caroline Williams, PH.D., M.P.'s NPI is 1013191279 with credentials PH.D., M.P.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.