2026 NPPES data Internal Medicine Physician NPI 1861413551 M.D.
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NAIL AMRO, M.D.

Internal Medicine Physician in FAIRFIELD, 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
279
Medicare Part D claims · 122 beneficiaries · Internal Medicine Physician avg: 3K
MIPS score
85.7317/100
▲ 3 pts above national avg 83.1 · [object Object]
What the federal data reveals: NAIL AMRO, M.D. is a Internal Medicine Physician ([object Object]) practicing in FAIRFIELD, California with a Medicare Part D prescribing footprint of 279 claims across 122 beneficiaries . Their CMS MIPS Final Score of 85.7317/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: NAIL AMRO, M.D. reported a CMS MIPS final score of 85.7317 out of 100, above the 83.1 national average, and filed 279 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

NAIL AMRO, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

NAIL AMRO, M.D. at a glance

High performer (top quartile)

NPI registry status

Active

Issued 07/21/2006

NPI 1861413551

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

279 90% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

85.7317/100 2.6317000000000093% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in California

How Internal Medicine Physician compares to other specialties among California providers

California providers

Internal Medicine Physician share within California

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

Medicare quality performance — MIPS

NAIL AMRO, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average

High performer (top quartile)
MIPS Final Score
85.7317/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) — 85.7317/100 vs national avg 83.1

0%100%National avg83%85.7%
MIPS final score (Internal Medicine Physician) — 85.7317/100 vs national avg 83.1

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).

NAIL AMRO, M.D. is a Internal Medicine Physician provider practicing in FAIRFIELD, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1861413551. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

NAIL AMRO, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 1200 B GALE WILSON BLVD, FAIRFIELD, CA, 94533, with a listed phone of (707) 429-3600. NPI 1861413551 was issued on 07/21/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AMRO 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 279 prescription claims written by this provider, covering 122 Medicare beneficiaries and totaling roughly $15K in drug spend, with an opioid prescribing rate of 9.3%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 85.7317/100 for the 2023 performance year (Quality 82.6837, Cost 70.5887), compared with the national average of 83.1.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

1200 B GALE WILSON BLVD
FAIRFIELD, CA 94533

Provider Details

NPI 1861413551
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 07/21/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

85.7317
Final Score
Avg: 83.1
82.6837
Quality
70.5887
Cost
99
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where NAIL AMRO, 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.

JOHN MUIR PHYSICIAN NETWORK
BRENTWOOD, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 NAIL AMRO, M.D.. To verify NAIL AMRO, 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.

279
Total Claims
$15K
Total Drug Cost
122
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
292
Total Day Supply
5,417
Generic Drug Cost
$7K
Opioid Claims
26 (9.3% rate)
Antibiotic Claims
79

Patient Demographics

Average Patient Age
78.5 years
Avg HCC Risk Score
2.03
Gender Split
70% female / 30% male
Age Distribution
<65: 12, 65-74: 25, 75-84: 48, 85+: 37

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Cefpodoxime Proxetil
18
Cephalexin
15
Lisinopril
15
Metoprolol Succinate
13
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
12
Amlodipine Besylate
11
Atorvastatin Calcium
11

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

Internal Medicine Physician Overview

How NAIL AMRO, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

NAIL AMRO, M.D.'s 279 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in California

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

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

Frequently Asked Questions

What is NAIL AMRO, M.D.'s specialty?
NAIL AMRO, M.D. specializes in Internal Medicine Physician and practices in FAIRFIELD, California. Credentials: M.D..
How much does NAIL AMRO, M.D. prescribe under Medicare Part D?
In 2023, NAIL AMRO, M.D. wrote 279 Medicare Part D claims totaling $15K in drug costs for 122 beneficiaries.
What is NAIL AMRO, M.D.'s Medicare quality score?
NAIL AMRO, M.D. has a CMS MIPS Final Score of 85.7317/100 (Quality: 82.6837, Cost: 70.5887). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is NAIL AMRO, M.D. located?
NAIL AMRO, M.D. is located at 1200 B GALE WILSON BLVD, FAIRFIELD, CA, 94533. Phone: (707) 429-3600.
What is NAIL AMRO, M.D.'s NPI number?
NAIL AMRO, M.D.'s National Provider Identifier (NPI) is 1861413551, issued on 07/21/2006.
Does NAIL AMRO, M.D. prescribe opioids?
Yes, NAIL AMRO, M.D. had 26 opioid claims in 2023 with an opioid prescribing rate of 9.3%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does NAIL AMRO, M.D. prescribe most often?
Based on 2023 Medicare Part D data, NAIL AMRO, M.D.'s most frequently prescribed drugs include Cefpodoxime Proxetil, Cephalexin, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NAIL AMRO, M.D. accept Medicare?
NAIL AMRO, M.D. appears in CMS Medicare data with 279 Part D claims and 122 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NAIL AMRO, M.D.'s credentials?
NAIL AMRO, M.D.'s NPI is 1861413551 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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