2026 NPPES data Infectious Disease Physician NPI 1619181591 M.D.
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Carlos Figueroa Castro, M.D.

Infectious Disease Physician in Milwaukee, Wisconsin. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,292 in Infectious Disease 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
1K
Medicare Part D claims · 170 beneficiaries · Infectious Disease Physician avg: 816
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Carlos Figueroa Castro, M.D. filed 1,297 Medicare Part D claims in 2023 as a Infectious Disease Physician in Milwaukee, Wisconsin, prescribing 87% generic.

1K
Part D claims, 2023
87%
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.

Carlos Figueroa Castro, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

1,297 Top 22% higher than 78% 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%). This entry sits in this band. 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. 2K+: 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)

Carlos Figueroa Castro, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Carlos Figueroa Castro, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/09/2007

NPI 1619181591

Primary specialty

Infectious Disease Physician

Mid-sized

8,292 US NPIs in this specialty

Medicare Part D claims

1,297 59% vs specialty avg

2023 prescription claims

Specialty avg: 816

Specialty distribution in Wisconsin

How Infectious Disease Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Largest specialties in Wisconsin (% of in-state providers)

Physical Therapist - 5.6%Physical Therapist5.6%Pharmacist - 4.8%Pharmacist4.8%Registered Nurse - 4.5%Registered Nurse4.5%Professional Counselor - 3.3%Professional Counselor3.3%Student in an Organized Health Care Education/Training Program - 3.3%Student in an Organized Health Care Education/Training Program3.3%Family Medicine Physician - 3.2%Family Medicine Physician3.2%Infectious Disease Physician - 0.1%Infectious Disease Physician0.1%
Largest specialties in Wisconsin (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Infectious Disease Physician. Verify directly:

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).

Carlos Figueroa Castro, M.D. appears in the CMS NPPES registry as a Infectious Disease Physician provider holding M.D. credentials at 9200 W WISCONSIN AVE, Milwaukee, WI, 53226, with a listed phone of (414) 805-6444. NPI 1619181591 was issued on 05/09/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Figueroa Castro 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 1,297 prescription claims written by this provider, covering 170 Medicare beneficiaries and totaling roughly $779K in drug spend, split 13% brand-name and 87% 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.

Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 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

9200 W WISCONSIN AVE
Milwaukee, WI 53226

Provider Details

NPI 1619181591
Specialty Infectious Disease Physician
Credentials M.D.
Gender Male
NPI Issued 05/09/2007

Hospital and facility affiliations

Facilities where Carlos Figueroa Castro, 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.

Froedtert Andthe Medical College OF Wisconsin Community Physicians Inc
West Bend, WI
The Medical College OF Wisconsin Inc
Milwaukee, WI

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 · Typical

Carlos Figueroa Castro, M.D. - brand share 13.0%
Infectious Disease Physician average

13% brand-name claims vs 87% generic, on 1,297 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.

1,297
Total Claims
$779K
Total Drug Cost
170
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,607
Total Day Supply
40,523
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$702K
Generic Drug Cost
$77K
Antibiotic Claims
814

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
2.59
Gender Split
54% female / 46% male
Age Distribution
<65: 31, 65-74: 65, 75-84: 56, 85+: 18

Top Prescribed Drugs (Medicare Part D)

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

What Carlos Figueroa Castro, 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
Azithromycin
137
Rifampin
134
Ethambutol Hcl
125
Amoxicillin
74
Amikacin Sulfate
70
Cefdinir
70
Doxycycline Hyclate
53
Cephalexin
43
Levofloxacin
41
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
37

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

Infectious Disease Physician Overview

How Carlos Figueroa Castro, M.D. fits within the Infectious Disease Physician landscape nationally.

8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider

Carlos Figueroa Castro, M.D.'s 1,297 claims are above the specialty average of 816.

Nearby Infectious Disease Physician Providers in Wisconsin

Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Figueroa Castro.

Compare Infectious Disease 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Infectious Disease 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 Carlos Figueroa Castro, M.D.'s specialty?
Carlos Figueroa Castro, M.D. specializes in Infectious Disease Physician and practices in Milwaukee, Wisconsin. Credentials: M.D..
How much does Carlos Figueroa Castro, M.D. prescribe under Medicare Part D?
In 2023, Carlos Figueroa Castro, M.D. wrote 1,297 Medicare Part D claims totaling $779K in drug costs for 170 beneficiaries.
Where is Carlos Figueroa Castro, M.D. located?
Carlos Figueroa Castro, M.D. is located at 9200 W WISCONSIN AVE, Milwaukee, WI, 53226. Phone: (414) 805-6444.
What is Carlos Figueroa Castro, M.D.'s NPI number?
Carlos Figueroa Castro, M.D.'s National Provider Identifier (NPI) is 1619181591, issued on 05/09/2007.
Does Carlos Figueroa Castro, M.D. prescribe more brand-name or generic drugs?
Carlos Figueroa Castro, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $702K in brand drug costs.
How many Infectious Disease Physician providers are there in the US?
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does Carlos Figueroa Castro, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Carlos Figueroa Castro, M.D.'s most frequently prescribed drugs include Azithromycin, Rifampin, Ethambutol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carlos Figueroa Castro, M.D. accept Medicare?
Carlos Figueroa Castro, M.D. appears in CMS Medicare data with 1,297 Part D claims and 170 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carlos Figueroa Castro, M.D.'s credentials?
Carlos Figueroa Castro, M.D.'s NPI is 1619181591 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

Compiled from official public sources by the PlainDoctor editorial team.