2026 NPPES data Adult Medicine Physician NPI 1356341671 M.D.
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ROBERT LETAMENDI, M.D.

Adult Medicine Physician in WATSONVILLE, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
740
Medicare Part D claims · 55 beneficiaries · Adult Medicine Physician avg: 3K

What the federal data shows

ROBERT LETAMENDI, M.D. filed 740 Medicare Part D claims in 2023 as a Adult Medicine Physician in WATSONVILLE, California.

740
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.

ROBERT LETAMENDI, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

740 Top 29% higher than 71% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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

Board-eligible specialty (heuristic — not verified)

ROBERT LETAMENDI, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about ROBERT LETAMENDI, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/28/2005

NPI 1356341671

Primary specialty

Adult Medicine Physician

Niche

2,481 US NPIs in this specialty

Medicare Part D claims

740 74% vs specialty avg

2023 prescription claims

Specialty avg: 2,807

Specialty distribution in California

How Adult Medicine Physician compares to other specialties among California providers

California providers

Adult Medicine Physician share within California

1. Adult Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Adult Medicine Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Adult Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Adult Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Adult Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Adult Medicine Physician) — ABMS / AOA estimate

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).

ROBERT LETAMENDI, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 21 BRENNAN ST, WATSONVILLE, CA, 95076, with a listed phone of (831) 728-4030. NPI 1356341671 was issued on 07/28/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LETAMENDI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 740 prescription claims written by this provider, covering 55 Medicare beneficiaries and totaling roughly $81K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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

21 BRENNAN ST
WATSONVILLE, CA 95076

Provider Details

NPI 1356341671
Specialty Adult Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/28/2005

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 ROBERT LETAMENDI, M.D.. To verify ROBERT LETAMENDI, 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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

740
Total Claims
$81K
Total Drug Cost
55
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,668
Total Day Supply
48,964
Generic Drug Cost
$10K
Antibiotic Claims
16

Patient Demographics

Average Patient Age
71.7 years
Avg HCC Risk Score
0.83
Gender Split
29% female / 71% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What ROBERT LETAMENDI, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
100
Losartan Potassium
62
Metformin Hcl
56
Levothyroxine Sodium
43
Hydrochlorothiazide
37
Amlodipine Besylate
34
Losartan-Hydrochlorothiazide
Losartan/Hydrochlorothiazide
29
Escitalopram Oxalate
19
Gabapentin
18
Lisinopril
18

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Adult Medicine Physician Overview

How ROBERT LETAMENDI, M.D. fits within the Adult Medicine Physician landscape nationally.

2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider

ROBERT LETAMENDI, M.D.'s 740 claims are below the specialty average of 2,807.

Nearby Adult Medicine Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as LETAMENDI.

Compare Adult Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT LETAMENDI, M.D.'s specialty?
ROBERT LETAMENDI, M.D. specializes in Adult Medicine Physician and practices in WATSONVILLE, California. Credentials: M.D..
How much does ROBERT LETAMENDI, M.D. prescribe under Medicare Part D?
In 2023, ROBERT LETAMENDI, M.D. wrote 740 Medicare Part D claims totaling $81K in drug costs for 55 beneficiaries.
Where is ROBERT LETAMENDI, M.D. located?
ROBERT LETAMENDI, M.D. is located at 21 BRENNAN ST, WATSONVILLE, CA, 95076. Phone: (831) 728-4030.
What is ROBERT LETAMENDI, M.D.'s NPI number?
ROBERT LETAMENDI, M.D.'s National Provider Identifier (NPI) is 1356341671, issued on 07/28/2005.
How many Adult Medicine Physician providers are there in the US?
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does ROBERT LETAMENDI, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ROBERT LETAMENDI, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT LETAMENDI, M.D. accept Medicare?
ROBERT LETAMENDI, M.D. appears in CMS Medicare data with 740 Part D claims and 55 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT LETAMENDI, M.D.'s credentials?
ROBERT LETAMENDI, M.D.'s NPI is 1356341671 with credentials 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

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