2026 NPPES data Medical Physician Assistant NPI 1902915879 P.A.
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NELSON SANTIAGO, P.A.

Medical Physician Assistant in CHESAPEAKE, Virginia. 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
489
Medicare Part D claims · 228 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
62.1316/100
▼ 21 pts below national avg 83.1 · [object Object]

What the federal data shows

NELSON SANTIAGO, P.A. reported a CMS MIPS final score of 62.1316/100 — below the 83.1 national average — and filed 489 Medicare Part D claims in 2023.

62.1316/100
MIPS score · -21 vs avg
489
Part D claims, 2023
91%
generic prescribing

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.

NELSON SANTIAGO, P.A.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

62 6th percentile higher than 6% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). This entry sits in this band. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

What does the federal data show about NELSON SANTIAGO, P.A.?

Below national average

NPI registry status

Active

Issued 08/30/2006

NPI 1902915879

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

489 55% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

MIPS final score

62.1316/100 20.968399999999995% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Virginia

How Medical Physician Assistant compares to other specialties among Virginia providers

Virginia providers

Medical Physician Assistant share within Virginia

1. Medical Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Medical Physician Assistant share within Virginia

Medicare quality performance — MIPS

NELSON SANTIAGO, P.A.'s 2023 MIPS final score plotted against the Medical Physician Assistant national average

Below national average
MIPS Final Score
62.1316/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Medical Physician Assistant) — 62.1316/100 vs national avg 83.1

0%100%National avg83%62.1%
MIPS final score (Medical Physician Assistant) — 62.1316/100 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).

NELSON SANTIAGO, P.A. appears in the CMS NPPES registry as a Medical Physician Assistant provider holding P.A. credentials at 2425 TAYLOR RD, CHESAPEAKE, VA, 23321, with a listed phone of (757) 215-1800. NPI 1902915879 was issued on 08/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SANTIAGO 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 489 prescription claims written by this provider, covering 228 Medicare beneficiaries and totaling roughly $28K in drug spend, split 9% brand-name and 91% generic by claim count. 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 62.1316/100 for the 2023 performance year (Quality 72.4397, Cost 84.6656), compared with the national average of 83.1.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

2425 TAYLOR RD
CHESAPEAKE, VA 23321

Provider Details

NPI 1902915879
Specialty Medical Physician Assistant
Credentials P.A.
Gender Male
NPI Issued 08/30/2006

CMS Quality Score (MIPS)

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

62.1316
Final Score
Avg: 83.1
72.4397
Quality
84.6656
Cost
0
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where NELSON SANTIAGO, P.A. 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.

PATIENT FIRST RICHMOND MEDICAL GROUP PLLC
CHESAPEAKE, VA

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

Brand vs generic prescribing mix · Generic-heavy

NELSON SANTIAGO, P.A. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 489 2023 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 2023.

489
Total Claims
$28K
Total Drug Cost
228
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
752
Total Day Supply
15,985
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$22K
Generic Drug Cost
$6K
Antibiotic Claims
105

Patient Demographics

Average Patient Age
68.5 years
Avg HCC Risk Score
1.07
Gender Split
65% female / 35% male

Top Prescribed Drugs (Medicare Part D)

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

What NELSON SANTIAGO, P.A. 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
Doxycycline Hyclate
55
Albuterol Sulfate Hfa
Albuterol Sulfate
40
Prednisone
39
Methylprednisolone
22
Lisinopril
19
Methocarbamol
17
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
17
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
12
Ibuprofen
11
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
11

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

Medical Physician Assistant Overview

How NELSON SANTIAGO, P.A. fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

NELSON SANTIAGO, P.A.'s 489 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in Virginia

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

Compare Medical Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is NELSON SANTIAGO, P.A.'s specialty?
NELSON SANTIAGO, P.A. specializes in Medical Physician Assistant and practices in CHESAPEAKE, Virginia. Credentials: P.A..
How much does NELSON SANTIAGO, P.A. prescribe under Medicare Part D?
In 2023, NELSON SANTIAGO, P.A. wrote 489 Medicare Part D claims totaling $28K in drug costs for 228 beneficiaries.
What is NELSON SANTIAGO, P.A.'s Medicare quality score?
NELSON SANTIAGO, P.A. has a CMS MIPS Final Score of 62.1316/100 (Quality: 72.4397, Cost: 84.6656). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is NELSON SANTIAGO, P.A. located?
NELSON SANTIAGO, P.A. is located at 2425 TAYLOR RD, CHESAPEAKE, VA, 23321. Phone: (757) 215-1800.
What is NELSON SANTIAGO, P.A.'s NPI number?
NELSON SANTIAGO, P.A.'s National Provider Identifier (NPI) is 1902915879, issued on 08/30/2006.
Does NELSON SANTIAGO, P.A. prescribe more brand-name or generic drugs?
NELSON SANTIAGO, P.A.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $22K in brand drug costs.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does NELSON SANTIAGO, P.A. prescribe most often?
Based on 2023 Medicare Part D data, NELSON SANTIAGO, P.A.'s most frequently prescribed drugs include Doxycycline Hyclate, Albuterol Sulfate Hfa, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NELSON SANTIAGO, P.A. accept Medicare?
NELSON SANTIAGO, P.A. appears in CMS Medicare data with 489 Part D claims and 228 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NELSON SANTIAGO, P.A.'s credentials?
NELSON SANTIAGO, P.A.'s NPI is 1902915879 with credentials P.A.. 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