2026 NPPES data Internal Medicine Physician NPI 1205923505 M.D.
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LUIS FORTI ISALES, M.D.

Internal Medicine Physician in BAYAMON, 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
26K
Medicare Part D claims · 1K beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
43 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

LUIS FORTI ISALES, M.D. filed 26,094 Medicare Part D claims in 2023 as a Internal Medicine Physician in BAYAMON, Puerto Rico, prescribing 84% generic.

26K
Part D claims, 2023
84%
generic prescribing
$1.1K
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.

LUIS FORTI ISALES, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

26,094 Top 2% higher than 98% 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)

LUIS FORTI ISALES, 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 LUIS FORTI ISALES, M.D.?

Quality data not reported

NPI registry status

Active

Issued 10/06/2006

NPI 1205923505

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

26,094 861% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Puerto Rico

How Internal Medicine Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

Internal Medicine Physician share within Puerto Rico

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

Specialty board-certification context

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

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

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

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

LUIS FORTI ISALES, M.D. is a Internal Medicine Physician provider practicing in BAYAMON, Puerto Rico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1205923505. 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.

LUIS FORTI ISALES, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at EDIFICIO MEDICO SANTA CRUZ # 73, BAYAMON, PR, 00960, with a listed phone of (787) 269-8611. NPI 1205923505 was issued on 10/06/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FORTI ISALES 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 26,094 prescription claims written by this provider, covering 1,128 Medicare beneficiaries and totaling roughly $2.8 million in drug spend, split 16% brand-name and 84% generic by claim count, with an opioid prescribing rate of 0.2%. 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.

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

EDIFICIO MEDICO SANTA CRUZ # 73
BAYAMON, PR 00960

Provider Details

NPI 1205923505
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 10/06/2006

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 LUIS FORTI ISALES, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

Largest payer

AstraZeneca Pharmaceuticals LP

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 · Typical

LUIS FORTI ISALES, M.D. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 26,094 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.

26,094
Total Claims
$2.8M
Total Drug Cost
1,128
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
52,229
Total Day Supply
1,538,162
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$2.3M
Generic Drug Cost
$495K
Opioid Claims
63 (0.2% rate)
Antibiotic Claims
218

Patient Demographics

Average Patient Age
72.9 years
Avg HCC Risk Score
2.05
Gender Split
62% female / 38% male
Age Distribution
<65: 142, 65-74: 533, 75-84: 323, 85+: 130

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Synthroid
Levothyroxine Sodium
1,166
Simvastatin
1,134
Atorvastatin Calcium
1,038
Losartan Potassium
947
Amlodipine Besylate
842
Famotidine
833
Gabapentin
787
Metformin Hcl
751
Pantoprazole Sodium
685
Glimepiride
619

* 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 LUIS FORTI ISALES, 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

LUIS FORTI ISALES, M.D.'s 26,094 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Puerto Rico

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

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

Frequently Asked Questions

What is LUIS FORTI ISALES, M.D.'s specialty?
LUIS FORTI ISALES, M.D. specializes in Internal Medicine Physician and practices in BAYAMON, Puerto Rico. Credentials: M.D..
How much does LUIS FORTI ISALES, M.D. prescribe under Medicare Part D?
In 2023, LUIS FORTI ISALES, M.D. wrote 26,094 Medicare Part D claims totaling $2.8M in drug costs for 1,128 beneficiaries.
Where is LUIS FORTI ISALES, M.D. located?
LUIS FORTI ISALES, M.D. is located at EDIFICIO MEDICO SANTA CRUZ # 73, BAYAMON, PR, 00960. Phone: (787) 269-8611.
What is LUIS FORTI ISALES, M.D.'s NPI number?
LUIS FORTI ISALES, M.D.'s National Provider Identifier (NPI) is 1205923505, issued on 10/06/2006.
Does LUIS FORTI ISALES, M.D. prescribe more brand-name or generic drugs?
LUIS FORTI ISALES, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $2.3M in brand drug costs.
Does LUIS FORTI ISALES, M.D. prescribe opioids?
Yes, LUIS FORTI ISALES, M.D. had 63 opioid claims in 2023 with an opioid prescribing rate of 0.2%.
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 LUIS FORTI ISALES, M.D. prescribe most often?
Based on 2023 Medicare Part D data, LUIS FORTI ISALES, M.D.'s most frequently prescribed drugs include Synthroid, Simvastatin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LUIS FORTI ISALES, M.D. accept Medicare?
LUIS FORTI ISALES, M.D. appears in CMS Medicare data with 26,094 Part D claims and 1,128 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LUIS FORTI ISALES, M.D.'s credentials?
LUIS FORTI ISALES, M.D.'s NPI is 1205923505 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