NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1396777264 PH.D., M.D.
Verify on CMS → Peter Linfoot, PH.D., M.D.
Endocrinology, Diabetes & Metabolism Physician in Long Beach, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,078 in Endocrinology, Diabetes & Metabolism Physician, 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
4K
Medicare Part D claims · 479 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
53%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$616.08
26 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Peter Linfoot, PH.D., M.D. filed 4,116 Medicare Part D claims in 2024 as an Endocrinology, Diabetes & Metabolism Physician in Long Beach, California, prescribing 53% generic.
- 4K
- Part D claims, 2024
- 53%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥92nd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Peter Linfoot, PH.D., M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1396777264), first enumerated 07/07/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,116 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$616.08 in reported industry payments (26 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Peter Linfoot, PH.D., M.D.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1396777264 · Endocrinology, Diabetes & Metabolism Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1396777264
- ENUM-LEGACY 2006
- TAX-MID 8K Endocrinology, Diabetes
- RX-MID 4,116
- BOOK-LIGHT 890 in California
- PHOTO-ENUM Tracy Breen · 2006
Peter Linfoot, PH.D., M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,116 ≥ 92nd percentile 92% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Peter Linfoot, PH.D., M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Peter Linfoot, PH.D., M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
4,116 50% vs specialty avg
Specialty distribution in California
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among California 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 Endocrinology, Diabetes & Metabolism Physician. 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).
Practice Address
Provider Details
| NPI | 1396777264 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | PH.D., M.D. |
| Gender | Male |
| NPI Issued | 07/07/2006 |
Hospital and facility affiliations
Facilities where Peter Linfoot, PH.D., M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Healthcare Partners Affiliates Medical Group
Anaheim, CA
Privia Medical Group Washington PLLC
Walla Walla, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Peter Linfoot, PH.D., M.D.. Source: openpaymentsdata.cms.gov.
Total received
$616
Largest payer
AstraZeneca Pharmaceuticals LP
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Peter Linfoot, PH.D., M.D.. To verify Peter Linfoot, PH.D., M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Peter Linfoot, PH.D., M.D. - brand share 41.0%
Endocrinology, Diabetes & Metabolism Physician average
41% brand-name claims vs 53% generic, on 4,116 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
4,116
Total Claims
$1.4M
Total Drug Cost
479
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,316.4
- Total Day Supply
- 245,495
- Brand vs Generic
- 41% brand / 53% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $56K
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.39
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 83, 65-74: 212, 75-84: 145, 85+: 39
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Peter Linfoot, PH.D., M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Levothyroxine Sodium
Levothyroxine Sodium
593 claims
- Ozempic 217
Ozempic
217 claims
- Metformin Hcl Er 176
Metformin Hcl Er
176 claims
- Liothyronine Sodium 158
Liothyronine Sodium
158 claims
- Trulicity 130
Trulicity
130 claims
- Lantus Solostar 120
Lantus Solostar
120 claims
- Metformin Hcl 100
Metformin Hcl
100 claims
- Estradiol 85
Estradiol
85 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 593 |
| Ozempic Semaglutide | 217 |
| Metformin Hcl Er Metformin Hcl | 176 |
| Liothyronine Sodium | 158 |
| Trulicity Dulaglutide | 130 |
| Lantus Solostar Insulin Glargine,hum.Rec.Anlog | 120 |
| Metformin Hcl | 100 |
| Estradiol | 85 |
| Repaglinide | 76 |
| Pioglitazone Hcl | 70 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in CA →
All providers in California →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Peter Linfoot, PH.D., M.D. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
8,078
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,739
Avg Claims per Provider
Peter Linfoot, PH.D., M.D.'s 4,116 claims are above the specialty average of 2,739.
Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Linfoot, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Linfoot.
One of 890 Endocrinology, Diabetes & Metabolism Physician providers enrolled in California, 5 are shown here.
Dr. Anita Abraham
M.D.
Stockton, CA
Dr. Sallie Adams
M.D.
Roseville, CA
Ananta Addala
Palo Alto, CA
Dr. Helen Adelberg
M.D.
Encino, CA
Dr. David Aftergood
MD
Beverly Hills, CA
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Peter Linfoot, PH.D., M.D.'s specialty? ▼
Peter Linfoot, PH.D., M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Long Beach, California. Credentials: PH.D., M.D..
How much does Peter Linfoot, PH.D., M.D. prescribe under Medicare Part D? ▼
In 2024, Peter Linfoot, PH.D., M.D. wrote 4,116 Medicare Part D claims totaling $1.4M in drug costs for 479 beneficiaries.
Where is Peter Linfoot, PH.D., M.D. located? ▼
Peter Linfoot, PH.D., M.D. is located at 2699 ATLANTIC AVE, Long Beach, CA, 90806. Phone: (562) 426-3333.
What is Peter Linfoot, PH.D., M.D.'s NPI number? ▼
Peter Linfoot, PH.D., M.D.'s National Provider Identifier (NPI) is 1396777264, issued on 07/07/2006.
Does Peter Linfoot, PH.D., M.D. prescribe more brand-name or generic drugs? ▼
Peter Linfoot, PH.D., M.D.'s prescribing is 41% brand-name and 53% generic drugs by claim count, with $1.3M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 8,078 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,739 Medicare Part D claims per year.
What drugs does Peter Linfoot, PH.D., M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Peter Linfoot, PH.D., M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Ozempic, Metformin Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Peter Linfoot, PH.D., M.D. accept Medicare? ▼
Peter Linfoot, PH.D., M.D. appears in CMS Medicare data with 4,116 Part D claims and 479 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Peter Linfoot, PH.D., M.D.'s credentials? ▼
Peter Linfoot, PH.D., M.D.'s NPI is 1396777264 with credentials PH.D., M.D.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.