2026 NPPES data Internal Medicine Physician NPI 1538483284 M.D.
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Fernanda Porto Carreiro, M.D.

Internal Medicine Physician in Rockville, Maryland. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in Internal Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
3K
Medicare Part D claims · 275 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
86.8/100
▲ 4 pts above national avg 83.1 · Above neutral
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Fernanda Porto Carreiro, M.D. reported a CMS MIPS final score of 86.8/100 - above the 83.1 national average - and filed 2,754 Medicare Part D claims in 2023.

86.8/100
MIPS score · +4 vs avg
3K
Part D claims, 2023
91%
generic prescribing
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.

Fernanda Porto Carreiro, M.D.'s MIPS score vs every scored U.S. clinician

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

87 Top 48% higher than 52% 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%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90+: 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

Where Fernanda Porto Carreiro, M.D. sits

This provider among internal medicine physician peers

Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Fernanda Porto Carreiro, M.D. writes more Part D claims than 70% of them and scores higher on MIPS quality than 52% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 33Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 2Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 32Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 35Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 80Fernanda Porto Carreiro, M.D.-Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 52
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Fernanda Porto Carreiro, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Fernanda Porto Carreiro, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Fernanda Porto Carreiro, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 03/24/2010

NPI 1538483284

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,754 1% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

86.8/100 3.7 pts vs avg

Above neutral band

vs 83.1 national avg

Specialty distribution in Maryland

How Internal Medicine Physician compares to other specialties among Maryland providers

Maryland providers
Behavior Technician - 14.1%Behavior Technician14.1%Clinical Social Worker - 5.5%Clinical Social Worker5.5%Student in an Organized Health Care Education/Training Program - 4.5%Student in an Organized Health Care Education/Training Program4.5%Home Health Aide - 4.4%Home Health Aide4.4%Physical Therapist - 3.9%Physical Therapist3.9%Pharmacist - 3.6%Pharmacist3.6%Internal Medicine Physician - 2.8%Internal Medicine Physician2.8%
Largest specialties in Maryland (% of in-state providers)

Medicare quality performance, MIPS

Fernanda Porto Carreiro, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average

High performer (top quartile)
MIPS Final Score
86.8/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) - 86.8/100 vs national avg 83.1

0%100%National avg83%86.8%
MIPS final score (Internal Medicine Physician) - 86.8/100 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).

Fernanda Porto Carreiro, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 14955 SHADY GROVE RD STE 100, Rockville, MD, 20850, with a listed phone of (301) 990-3190. NPI 1538483284 was issued on 03/24/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Porto Carreiro 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 2,754 prescription claims written by this provider, covering 275 Medicare beneficiaries and totaling roughly $244K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 0.8%. 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 86.8/100 for the 2023 performance year (Quality 86.5, Cost 72), 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

14955 SHADY GROVE RD STE 100
Rockville, MD 20850

Provider Details

NPI 1538483284
Specialty Internal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 03/24/2010

CMS Quality Score (MIPS)

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

86.7926
Final Score
Avg: 83.1
86.467
Quality
72.0084
Cost
97
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Fernanda Porto Carreiro, 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.

Johns Hopkins Community Physicians, Inc
Laurel, MD
Suburban/nrh Medical Rehabilitation Inc
Bethesda, MD

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

Fernanda Porto Carreiro, M.D. - brand share 9.0%
Internal Medicine Physician average

9% brand-name claims vs 91% generic, on 2,754 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.

2,754
Total Claims
$244K
Total Drug Cost
275
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,803
Total Day Supply
200,441
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$188K
Generic Drug Cost
$56K
Opioid Claims
22 (0.8% rate)
Antibiotic Claims
63

Patient Demographics

Average Patient Age
74.7 years
Avg HCC Risk Score
1.04
Gender Split
63% female / 37% male
Age Distribution
<65: 21, 65-74: 102, 75-84: 115, 85+: 37

Top Prescribed Drugs (Medicare Part D)

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

What Fernanda Porto Carreiro, M.D. 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
Atorvastatin Calcium
276
Levothyroxine Sodium
154
Amlodipine Besylate
153
Losartan Potassium
110
Metformin Hcl
102
Hydrochlorothiazide
82
Famotidine
80
Pantoprazole Sodium
79
Lisinopril
73
Rosuvastatin Calcium
73

* 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 Fernanda Porto Carreiro, 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

Fernanda Porto Carreiro, M.D.'s 2,754 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Maryland

Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Porto Carreiro.

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Maryland medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Fernanda Porto Carreiro, M.D.'s specialty?
Fernanda Porto Carreiro, M.D. specializes in Internal Medicine Physician and practices in Rockville, Maryland. Credentials: M.D..
How much does Fernanda Porto Carreiro, M.D. prescribe under Medicare Part D?
In 2023, Fernanda Porto Carreiro, M.D. wrote 2,754 Medicare Part D claims totaling $244K in drug costs for 275 beneficiaries.
What is Fernanda Porto Carreiro, M.D.'s Medicare quality score?
Fernanda Porto Carreiro, M.D. has a CMS MIPS Final Score of 86.8/100 (Quality: 86.5, Cost: 72). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Fernanda Porto Carreiro, M.D. located?
Fernanda Porto Carreiro, M.D. is located at 14955 SHADY GROVE RD STE 100, Rockville, MD, 20850. Phone: (301) 990-3190.
What is Fernanda Porto Carreiro, M.D.'s NPI number?
Fernanda Porto Carreiro, M.D.'s National Provider Identifier (NPI) is 1538483284, issued on 03/24/2010.
Does Fernanda Porto Carreiro, M.D. prescribe more brand-name or generic drugs?
Fernanda Porto Carreiro, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $188K in brand drug costs.
Does Fernanda Porto Carreiro, M.D. prescribe opioids?
Yes, Fernanda Porto Carreiro, M.D. had 22 opioid claims in 2023 with an opioid prescribing rate of 0.8%.
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 Fernanda Porto Carreiro, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Fernanda Porto Carreiro, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Fernanda Porto Carreiro, M.D. accept Medicare?
Fernanda Porto Carreiro, M.D. appears in CMS Medicare data with 2,754 Part D claims and 275 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Fernanda Porto Carreiro, M.D.'s credentials?
Fernanda Porto Carreiro, M.D.'s NPI is 1538483284 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

Compiled from official public sources by the PlainDoctor editorial team.