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 1,101 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
855
Medicare Part D claims · 69 beneficiaries · Pediatric Infectious Diseases Physician avg: 306
Generic prescribing
68%
generic claims · 32% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Natasha Rybak, M.D. filed 855 Medicare Part D claims in 2024 as a Pediatric Infectious Diseases Physician in Providence, Rhode Island, prescribing 68% generic.
- 855
- Part D claims, 2024
- 68%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥72nd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Natasha Rybak, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1932301330), first enumerated 06/05/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 855 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
4 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Rybak with other Pediatric Infectious Diseases Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Rhode Island
- 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
Other specialties in Providence: Student in an Organized Health Care Education/Training Program (852) · Clinical Social Worker (751) · Internal Medicine Physician (542) · Registered Nurse (364)
CMS NPPES provider registry desk
NPI 1932301330 · Pediatric Infectious Diseases Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1932301330
- ENUM-MID 2007
- TAX-NARROW 1,101
- RX-LIGHT 855
- BOOK-THIN 6 in Rhode Island
- PHOTO-ENUM Michelle Hoffman, MD · 2007
Natasha Rybak, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
855 ≥ 72nd percentile 72% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Natasha Rybak, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 4 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
855 179% 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).
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.
According to CMS billing records, Natasha Rybak, M.D. is affiliated with 4 Medicare-billing facilities, 1 of which carry a CMS Hospital overall star rating.
The Miriam Hospital
★★★★☆ 4/5
Providence, RI
Acute Care Hospitals
CMS CCN: 410012
Affinity Physicians LLC.
Providence, RI
Brown Medicine
Providence, RI
Lifespan Physician Group Inc
Newport, 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 32.0%
Pediatric Infectious Diseases Physician average
32% brand-name claims vs 68% generic, on 855 2024 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 2024.
855
Total Claims
$1.3M
Total Drug Cost
69
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 924.333
- Total Day Supply
- 25,958
- Brand vs Generic
- 32% brand / 68% generic
- Brand Drug Cost
- $1.2M
- Generic Drug Cost
- $45K
- Antibiotic Claims
- 186
Patient Demographics
- Average Patient Age
- 64.5 years
- Avg HCC Risk Score
- 1.60
- Gender Split
- 41% female / 59% male
- Age Distribution
- <65: 29, 65-74: 24, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Natasha Rybak, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Azithromycin
Azithromycin
78 claims
- Ethambutol Hcl
Ethambutol Hcl
76 claims
- Rifampin
Rifampin
76 claims
- Isoniazid
Isoniazid
42 claims
- Dovato
Dovato
37 claims
- Biktarvy
Biktarvy
36 claims
- Arikayce 30
Arikayce
30 claims
- Tivicay 22
Tivicay
22 claims
| Drug | Claims |
|---|---|
| Azithromycin | 78 |
| Ethambutol Hcl | 76 |
| Rifampin | 76 |
| Isoniazid | 42 |
| Dovato Dolutegravir Sodium/Lamivudine | 37 |
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 36 |
| Arikayce Amikacin Liposomal/Neb.Accessr | 30 |
| Tivicay Dolutegravir Sodium | 22 |
| Ondansetron Odt Ondansetron | 21 |
| Fluoxetine Hcl | 18 |
* 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.
1,101
Pediatric Infectious Diseases Physician Providers in US
50
States with Pediatric Infectious Diseases Physician
306
Avg Claims per Provider
Natasha Rybak, M.D.'s 855 claims are above the specialty average of 306.
Nationwide Pediatric Infectious Diseases Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Rybak, both outside Rhode Island so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 2024, Natasha Rybak, M.D. wrote 855 Medicare Part D claims totaling $1.3M in drug costs for 69 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 32% brand-name and 68% generic drugs by claim count, with $1.2M in brand drug costs.
How many Pediatric Infectious Diseases Physician providers are there in the US? ▼
There are 1,101 Pediatric Infectious Diseases Physician providers across 50 states in the US. The average Pediatric Infectious Diseases Physician provider writes 306 Medicare Part D claims per year.
What drugs does Natasha Rybak, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Natasha Rybak, M.D.'s most frequently prescribed drugs include Azithromycin, Ethambutol Hcl, Rifampin. 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 855 Part D claims and 69 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.