2026 NPPES data Anatomic Pathology Physician NPI 1598377335 MD
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GEORGE SANTIAGO, MD

Anatomic Pathology Physician in SAN JUAN, Puerto Rico. 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
15
Medicare Part D claims · Anatomic Pathology Physician avg: 214

What the federal data shows

GEORGE SANTIAGO, MD filed 15 Medicare Part D claims in 2023 as a Anatomic Pathology Physician in SAN JUAN, Puerto Rico.

15
Part D claims, 2023
Likely
board-certified (heuristic)

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.

GEORGE SANTIAGO, MD's Medicare Part D volume vs every U.S. prescriber

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

15 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 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 certification likely (heuristic — not verified)

GEORGE SANTIAGO, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — 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 GEORGE SANTIAGO, MD?

Quality data not reported

NPI registry status

Active

Issued 08/22/2020

NPI 1598377335

Primary specialty

Anatomic Pathology Physician

Niche

2,597 US NPIs in this specialty

Medicare Part D claims

15 93% vs specialty avg

2023 prescription claims

Specialty avg: 214

Specialty distribution in Puerto Rico

How Anatomic Pathology Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

Anatomic Pathology Physician share within Puerto Rico

1. Anatomic Pathology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Anatomic Pathology Physician share within Puerto Rico

Specialty board-certification context

Estimated specialty board-certified rate — Anatomic Pathology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Anatomic Pathology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Anatomic Pathology 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).

GEORGE SANTIAGO, MD appears in the CMS NPPES registry as a Anatomic Pathology Physician provider holding MD credentials at AVE AMERICO MIRANDA S/N, SAN JUAN, PR, 00935, with a listed phone of (787) 340-0501. NPI 1598377335 was issued on 08/22/2020. 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 15 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $178 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.

Anatomic Pathology Physician is a narrow specialty nationwide, with 2,597 enrolled providers across 54 states and an average of 214 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

AVE AMERICO MIRANDA S/N
SAN JUAN, PR 00935

Provider Details

NPI 1598377335
Specialty Anatomic Pathology Physician
Credentials MD
Gender Male
NPI Issued 08/22/2020

Hospital and facility affiliations

Facilities where GEORGE SANTIAGO, MD 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.

SOUTHERN PATHOLOGY SERVICES INC
PONCE, PR

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

Medicare Part D Prescribing Data

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

15
Total Claims
$178
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
21
Total Day Supply
461
Brand Drug Cost
$0
Generic Drug Cost
$178

Patient Demographics

Average Patient Age
82.3 years
Avg HCC Risk Score
1.84

Anatomic Pathology Physician Overview

How GEORGE SANTIAGO, MD fits within the Anatomic Pathology Physician landscape nationally.

2,597
Anatomic Pathology Physician Providers in US
54
States with Anatomic Pathology Physician
214
Avg Claims per Provider

GEORGE SANTIAGO, MD's 15 claims are below the specialty average of 214.

Nearby Anatomic Pathology Physician Providers in Puerto Rico

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

Compare Anatomic Pathology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GEORGE SANTIAGO, MD's specialty?
GEORGE SANTIAGO, MD specializes in Anatomic Pathology Physician and practices in SAN JUAN, Puerto Rico. Credentials: MD.
How much does GEORGE SANTIAGO, MD prescribe under Medicare Part D?
In 2023, GEORGE SANTIAGO, MD wrote 15 Medicare Part D claims totaling $178 in drug costs for N/A beneficiaries.
Where is GEORGE SANTIAGO, MD located?
GEORGE SANTIAGO, MD is located at AVE AMERICO MIRANDA S/N, SAN JUAN, PR, 00935. Phone: (787) 340-0501.
What is GEORGE SANTIAGO, MD's NPI number?
GEORGE SANTIAGO, MD's National Provider Identifier (NPI) is 1598377335, issued on 08/22/2020.
How many Anatomic Pathology Physician providers are there in the US?
There are 2,597 Anatomic Pathology Physician providers across 54 states in the US. The average Anatomic Pathology Physician provider writes 214 Medicare Part D claims per year.
Does GEORGE SANTIAGO, MD accept Medicare?
GEORGE SANTIAGO, MD appears in CMS Medicare data with 15 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GEORGE SANTIAGO, MD's credentials?
GEORGE SANTIAGO, MD's NPI is 1598377335 with credentials MD. 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