NPI registry status
Active
2026 NPPES data Pediatric Infectious Diseases Physician NPI 1932301330 M.D.
Verify on CMS → Natasha Rybak, M.D.
Pediatric Infectious Diseases Physician in Providence, Rhode Island.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,067 in Pediatric Infectious Diseases 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
540
Medicare Part D claims · 54 beneficiaries · Pediatric Infectious Diseases Physician avg: 244
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Natasha Rybak, M.D. filed 540 Medicare Part D claims in 2023 as a Pediatric Infectious Diseases Physician in Providence, Rhode Island, prescribing 70% generic.
- 540
- Part D claims, 2023
- 70%
- 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.
Natasha Rybak, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
540 Top 34% higher than 66% of 1,370,886 prescribers
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)
Natasha Rybak, 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 Natasha Rybak, M.D.?
Quality data not reportedPrimary specialty
Pediatric Infectious Diseases Physician
Medicare Part D claims
540 121% vs specialty avg
Specialty distribution in Rhode Island
How Pediatric Infectious Diseases Physician compares to other specialties among Rhode Island 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 Pediatric Infectious Diseases Physician. Verify directly:
How MIPS and board certification work
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).
Natasha Rybak, M.D. appears in the CMS NPPES registry as a Pediatric Infectious Diseases Physician provider holding M.D. credentials at 1125 N MAIN ST, Providence, RI, 02904, with a listed phone of (401) 793-2928. NPI 1932301330 was issued on 06/05/2007.
Medicare Part D records for calendar year 2023 show 540 prescription claims written by this provider, covering 54 Medicare beneficiaries and totaling roughly $691K in drug spend, split 30% brand-name and 70% generic by claim count.
Pediatric Infectious Diseases Physician is a narrow specialty nationwide, with 1,067 enrolled providers across 50 states and an average of 244 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
Provider Details
| NPI | 1932301330 |
|---|---|
| Specialty | Pediatric Infectious Diseases Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/05/2007 |
Hospital and facility affiliations
Facilities where Natasha Rybak, 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.
The Miriam Hospital
★★★★☆ 4/5
Providence, RI
Acute Care Hospitals
CMS CCN: 410012
Brown Medicine
Providence, RI
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 · Above average
Natasha Rybak, M.D. - brand share 30.0%
Pediatric Infectious Diseases Physician average
30% brand-name claims vs 70% generic, on 540 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.
540
Total Claims
$691K
Total Drug Cost
54
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 615
- Total Day Supply
- 17,211
- Brand vs Generic
- 30% brand / 70% generic
- Brand Drug Cost
- $650K
- Generic Drug Cost
- $41K
- Antibiotic Claims
- 112
Patient Demographics
- Average Patient Age
- 63.3 years
- Avg HCC Risk Score
- 1.69
- Gender Split
- 39% female / 61% male
- Age Distribution
- <65: 22, 65-74: 16, 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 Natasha Rybak, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Rifampin
Rifampin
54 claims
- Azithromycin
Azithromycin
51 claims
- Isoniazid
Isoniazid
40 claims
- Ethambutol Hcl
Ethambutol Hcl
39 claims
- Biktarvy
Biktarvy
27 claims
- Dovato
Dovato
24 claims
- Fluoxetine Hcl
Fluoxetine Hcl
22 claims
- Rifabutin 20
Rifabutin
20 claims
| Drug | Claims |
|---|---|
| Rifampin | 54 |
| Azithromycin | 51 |
| Isoniazid | 40 |
| Ethambutol Hcl | 39 |
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 27 |
| Dovato Dolutegravir Sodium/Lamivudine | 24 |
| Fluoxetine Hcl | 22 |
| Rifabutin | 20 |
| Arikayce Amikacin Liposomal/Neb.Accessr | 19 |
| Prezcobix Darunavir/Cobicistat | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Pediatric Infectious Diseases Physician in RI →
All providers in Rhode Island →
Compare specialties →
Pediatric Infectious Diseases Physician Overview
How Natasha Rybak, M.D. fits within the Pediatric Infectious Diseases Physician landscape nationally.
1,067
Pediatric Infectious Diseases Physician Providers in US
50
States with Pediatric Infectious Diseases Physician
244
Avg Claims per Provider
Natasha Rybak, M.D.'s 540 claims are above the specialty average of 244.
Nearby Pediatric Infectious Diseases Physician Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as Rybak.
Dr. Nicole Alexander-Scott
MD
Providence, RI
Dr. Young June Choe
MD
Providence, RI
Dr. Penelope Dennehy
MD
Providence, RI
Dr. Sabina Holland
M.D.
Providence, RI
Dr. Emily Lutterloh
MD
Providence, RI
Compare Pediatric Infectious Diseases 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 Rhode Island medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatric Infectious Diseases 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.
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Frequently Asked Questions
What is Natasha Rybak, M.D.'s specialty? ▼
Natasha Rybak, M.D. specializes in Pediatric Infectious Diseases Physician and practices in Providence, Rhode Island. Credentials: M.D..
How much does Natasha Rybak, M.D. prescribe under Medicare Part D? ▼
In 2023, Natasha Rybak, M.D. wrote 540 Medicare Part D claims totaling $691K in drug costs for 54 beneficiaries.
Where is Natasha Rybak, M.D. located? ▼
Natasha Rybak, M.D. is located at 1125 N MAIN ST, Providence, RI, 02904. Phone: (401) 793-2928.
What is Natasha Rybak, M.D.'s NPI number? ▼
Natasha Rybak, M.D.'s National Provider Identifier (NPI) is 1932301330, issued on 06/05/2007.
Does Natasha Rybak, M.D. prescribe more brand-name or generic drugs? ▼
Natasha Rybak, M.D.'s prescribing is 30% brand-name and 70% generic drugs by claim count, with $650K in brand drug costs.
How many Pediatric Infectious Diseases Physician providers are there in the US? ▼
There are 1,067 Pediatric Infectious Diseases Physician providers across 50 states in the US. The average Pediatric Infectious Diseases Physician provider writes 244 Medicare Part D claims per year.
What drugs does Natasha Rybak, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Natasha Rybak, M.D.'s most frequently prescribed drugs include Rifampin, Azithromycin, Isoniazid. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Natasha Rybak, M.D. accept Medicare? ▼
Natasha Rybak, M.D. appears in CMS Medicare data with 540 Part D claims and 54 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Natasha Rybak, M.D.'s credentials? ▼
Natasha Rybak, M.D.'s NPI is 1932301330 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
View source datasets and methodology notes
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.