2026 NPPES data General Practice Physician NPI 1366829731 MD
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ALBERTO GRANA SANTINI, MD

General Practice Physician in CAGUAS, 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
4K
Medicare Part D claims · 320 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
49%
generic claims · 51% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$992.69
44 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ALBERTO GRANA SANTINI, MD filed 4,105 Medicare Part D claims in 2023 as a General Practice Physician in CAGUAS, Puerto Rico, prescribing 49% generic.

4K
Part D claims, 2023
49%
generic prescribing
$992.69
industry payments (Sunshine Act)

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.

ALBERTO GRANA SANTINI, MD's Medicare Part D volume vs every U.S. prescriber

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

4,105 Top 8% higher than 92% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

ALBERTO GRANA SANTINI, MD 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 ALBERTO GRANA SANTINI, MD?

Quality data not reported

NPI registry status

Active

Issued 05/05/2015

NPI 1366829731

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

4,105 43% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in Puerto Rico

How General Practice Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

General Practice Physician share within Puerto Rico

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

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

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

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice 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).

ALBERTO GRANA SANTINI, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at CARR 172, CAGUAS, PR, 00725, with a listed phone of (787) 563-0550. NPI 1366829731 was issued on 05/05/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRANA SANTINI 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 4,105 prescription claims written by this provider, covering 320 Medicare beneficiaries and totaling roughly $1.3 million in drug spend, split 51% brand-name and 49% 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

CARR 172
CAGUAS, PR 00725

Provider Details

NPI 1366829731
Specialty General Practice Physician
Credentials MD
Gender Male
NPI Issued 05/05/2015

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 ALBERTO GRANA SANTINI, MD. Source: openpaymentsdata.cms.gov.

Total received

$993

Largest payer

Eli Lilly Export S.A. Puerto Rico Branch

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.

Brand vs generic prescribing mix · Brand-heavy

ALBERTO GRANA SANTINI, MD — brand share 51.0%
Specialty average (est.)

51% brand-name claims vs 49% generic, on 4,105 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.

4,105
Total Claims
$1.3M
Total Drug Cost
320
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,800
Total Day Supply
171,263
Brand vs Generic
51% brand / 49% generic
Brand Drug Cost
$1.3M
Generic Drug Cost
$23K

Patient Demographics

Average Patient Age
68.1 years
Avg HCC Risk Score
2.07
Gender Split
61% female / 39% male
Age Distribution
<65: 95, 65-74: 144, 75-84: 68, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

What ALBERTO GRANA SANTINI, MD 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
Synthroid
Levothyroxine Sodium
317
Metformin Hcl
237
Trijardy Xr
Empaglifloz/Linaglip/Metformin
229
Atorvastatin Calcium
210
Pioglitazone Hcl
198
Trulicity
Dulaglutide
178
Ozempic
Semaglutide
159
Rosuvastatin Calcium
143
Humalog
Insulin Lispro
122
Farxiga
Dapagliflozin Propanediol
100

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

General Practice Physician Overview

How ALBERTO GRANA SANTINI, MD fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

ALBERTO GRANA SANTINI, MD's 4,105 claims are above the specialty average of 2,872.

Nearby General Practice Physician Providers in Puerto Rico

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALBERTO GRANA SANTINI, MD's specialty?
ALBERTO GRANA SANTINI, MD specializes in General Practice Physician and practices in CAGUAS, Puerto Rico. Credentials: MD.
How much does ALBERTO GRANA SANTINI, MD prescribe under Medicare Part D?
In 2023, ALBERTO GRANA SANTINI, MD wrote 4,105 Medicare Part D claims totaling $1.3M in drug costs for 320 beneficiaries.
Where is ALBERTO GRANA SANTINI, MD located?
ALBERTO GRANA SANTINI, MD is located at CARR 172, CAGUAS, PR, 00725. Phone: (787) 563-0550.
What is ALBERTO GRANA SANTINI, MD's NPI number?
ALBERTO GRANA SANTINI, MD's National Provider Identifier (NPI) is 1366829731, issued on 05/05/2015.
Does ALBERTO GRANA SANTINI, MD prescribe more brand-name or generic drugs?
ALBERTO GRANA SANTINI, MD's prescribing is 51% brand-name and 49% generic drugs by claim count, with $1.3M in brand drug costs.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does ALBERTO GRANA SANTINI, MD prescribe most often?
Based on 2023 Medicare Part D data, ALBERTO GRANA SANTINI, MD's most frequently prescribed drugs include Synthroid, Metformin Hcl, Trijardy Xr. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALBERTO GRANA SANTINI, MD accept Medicare?
ALBERTO GRANA SANTINI, MD appears in CMS Medicare data with 4,105 Part D claims and 320 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALBERTO GRANA SANTINI, MD's credentials?
ALBERTO GRANA SANTINI, MD's NPI is 1366829731 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