2026 NPPES data Sleep Medicine (Family Medicine) Physician NPI 1528731098 MD
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WILLIAM ROSALES GONZALEZ, MD

Sleep Medicine (Family Medicine) Physician in WALDORF, Maryland. 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
984
Medicare Part D claims · 113 beneficiaries · Sleep Medicine (Family Medicine) Physician avg: 2K

What the federal data shows

WILLIAM ROSALES GONZALEZ, MD filed 984 Medicare Part D claims in 2023 as a Sleep Medicine (Family Medicine) Physician in WALDORF, Maryland.

984
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.

WILLIAM ROSALES GONZALEZ, MD's Medicare Part D volume vs every U.S. prescriber

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

984 Top 25% higher than 75% 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%). This entry sits in this band. 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)

WILLIAM ROSALES GONZALEZ, 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 WILLIAM ROSALES GONZALEZ, MD?

Quality data not reported

NPI registry status

Active

Issued 07/29/2021

NPI 1528731098

Primary specialty

Sleep Medicine (Family Medicine) Physician

Rare

190 US NPIs in this specialty

Medicare Part D claims

984 35% vs specialty avg

2023 prescription claims

Specialty avg: 1,506

Specialty distribution in Maryland

How Sleep Medicine (Family Medicine) Physician compares to other specialties among Maryland providers

Maryland providers

Sleep Medicine (Family Medicine) Physician share within Maryland

1. Sleep Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Sleep Medicine (Family Medicine) Physician share within Maryland

Specialty board-certification context

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

Quality data not reported
Est. board-certified rate
78%
Sleep Medicine (Family Medicine) Physician ABMS/AOA estimate

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

0%100%78%
Est. board-certified rate (Sleep Medicine (Family 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).

WILLIAM ROSALES GONZALEZ, MD appears in the CMS NPPES registry as a Sleep Medicine (Family Medicine) Physician provider holding MD credentials at 3575 OLD WASHINGTON RD STE C, WALDORF, MD, 20602, with a listed phone of (301) 638-5500. NPI 1528731098 was issued on 07/29/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROSALES GONZALEZ 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 984 prescription claims written by this provider, covering 113 Medicare beneficiaries and totaling roughly $138K 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.

Sleep Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 190 enrolled providers across 45 states and an average of 1,506 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

3575 OLD WASHINGTON RD STE C
WALDORF, MD 20602

Provider Details

NPI 1528731098
Specialty Sleep Medicine (Family Medicine) Physician
Credentials MD
Gender Male
NPI Issued 07/29/2021

Hospital and facility affiliations

Facilities where WILLIAM ROSALES GONZALEZ, 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.

PRIVIA MEDICAL GROUP, LLC
WALDORF, 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).

Medicare Part D Prescribing Data

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

984
Total Claims
$138K
Total Drug Cost
113
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,847
Total Day Supply
53,539
Generic Drug Cost
$15K
Antibiotic Claims
14

Patient Demographics

Average Patient Age
67.7 years
Avg HCC Risk Score
1.58
Gender Split
61% female / 39% male
Age Distribution
<65: 30, 65-74: 58, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What WILLIAM ROSALES GONZALEZ, 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
Atorvastatin Calcium
68
Gabapentin
57
Lisinopril
46
Amlodipine Besylate
42
Pantoprazole Sodium
35
Furosemide
31
Meloxicam
25
Potassium Chloride
24
Levothyroxine Sodium
21
Lisinopril-Hydrochlorothiazide
Lisinopril/Hydrochlorothiazide
21

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

Sleep Medicine (Family Medicine) Physician Overview

How WILLIAM ROSALES GONZALEZ, MD fits within the Sleep Medicine (Family Medicine) Physician landscape nationally.

190
Sleep Medicine (Family Medicine) Physician Providers in US
45
States with Sleep Medicine (Family Medicine) Physician
1,506
Avg Claims per Provider

WILLIAM ROSALES GONZALEZ, MD's 984 claims are below the specialty average of 1,506.

Nearby Sleep Medicine (Family Medicine) Physician Providers in Maryland

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

Compare Sleep Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM ROSALES GONZALEZ, MD's specialty?
WILLIAM ROSALES GONZALEZ, MD specializes in Sleep Medicine (Family Medicine) Physician and practices in WALDORF, Maryland. Credentials: MD.
How much does WILLIAM ROSALES GONZALEZ, MD prescribe under Medicare Part D?
In 2023, WILLIAM ROSALES GONZALEZ, MD wrote 984 Medicare Part D claims totaling $138K in drug costs for 113 beneficiaries.
Where is WILLIAM ROSALES GONZALEZ, MD located?
WILLIAM ROSALES GONZALEZ, MD is located at 3575 OLD WASHINGTON RD STE C, WALDORF, MD, 20602. Phone: (301) 638-5500.
What is WILLIAM ROSALES GONZALEZ, MD's NPI number?
WILLIAM ROSALES GONZALEZ, MD's National Provider Identifier (NPI) is 1528731098, issued on 07/29/2021.
How many Sleep Medicine (Family Medicine) Physician providers are there in the US?
There are 190 Sleep Medicine (Family Medicine) Physician providers across 45 states in the US. The average Sleep Medicine (Family Medicine) Physician provider writes 1,506 Medicare Part D claims per year.
What drugs does WILLIAM ROSALES GONZALEZ, MD prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM ROSALES GONZALEZ, MD's most frequently prescribed drugs include Atorvastatin Calcium, Gabapentin, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM ROSALES GONZALEZ, MD accept Medicare?
WILLIAM ROSALES GONZALEZ, MD appears in CMS Medicare data with 984 Part D claims and 113 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM ROSALES GONZALEZ, MD's credentials?
WILLIAM ROSALES GONZALEZ, MD's NPI is 1528731098 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