Bryn Boslett, M.D.
Infectious Disease Physician in San Francisco, California. 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.
What the federal data shows
Bryn Boslett, M.D. reported a CMS MIPS final score of 74.5/100 - below the 83.1 national average - and filed 737 Medicare Part D claims in 2023.
- 74.5/100
- MIPS score · -9 vs avg
- 737
- 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.
Bryn Boslett, 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
75 12th percentile higher than 12% of 477,587 scored providers
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 Bryn Boslett, M.D. sits
This provider among infectious disease physician peers
Across the 2,276 infectious disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Bryn Boslett, M.D. writes more Part D claims than 72% of them and scores higher on MIPS quality than 14% - placing this provider in the high-volume, lower-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
Each dot is one infectious disease physician peer from a representative sample of 60; the gold marker is Bryn Boslett, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
Bryn Boslett, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 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 Bryn Boslett, M.D.?
Below national averagePrimary specialty
Medicare Part D claims
MIPS final score
Specialty distribution in California
How Infectious Disease Physician compares to other specialties among California providers
Largest specialties in California (% of in-state providers)
Infectious Disease Physician ranks #104 among California's specialties (0.1% of in-state providers)
Each bar is a specialty's share of the California provider total, by primary NUCC taxonomy. The highlighted bar is Infectious Disease Physician; the long tail of smaller specialties is omitted for legibility.
Medicare quality performance, MIPS
Bryn Boslett, M.D.'s 2023 MIPS final score plotted against the Infectious Disease Physician national average
- MIPS Final Score
- 74.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Infectious Disease Physician) - 74.5/100 vs national avg 83.1
Quality benchmarks
- National MIPS avg 2023 reporting year
- Cost dim CMS Cost category
- Specialty volume Infectious Disease Physician US NPIs
74.5/100 MIPS final score - 8.6 pts below the 83.1 national average
Quality, Cost, Promoting Interoperability, and Improvement Activities composite score for the 2023 performance year. Specialty: Infectious Disease Physician. Cost dim: 46.7.
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).
Bryn Boslett, M.D. appears in the CMS NPPES registry as a Infectious Disease Physician provider holding M.D. credentials at 400 PARNASSUS AVE, San Francisco, CA, 94143, with a listed phone of (415) 353-2626. NPI 1962722439 was issued on 06/08/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Boslett 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 737 prescription claims written by this provider, covering 50 Medicare beneficiaries and totaling roughly $736K in drug spend, with an opioid prescribing rate of 3.8%. 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 74.5/100 for the 2023 performance year, compared with the national average of 83.1.
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
Provider Details
| NPI | 1962722439 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/08/2010 |
Verify this provider's license
PlainDoctor pulls this profile from the CMS NPPES public registry. Confirm Bryn Boslett, M.D.'s current license status, disciplinary history, and board certifications with the Medical Board of California in California before relying on this page for a clinical or care decision.
How we sourced this profile
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
Reporting: Group practice
Hospital and facility affiliations
Facilities where Bryn Boslett, 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, Bryn Boslett, M.D. is affiliated with 3 Medicare-billing facilities.
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Bryn Boslett, M.D.. To verify Bryn Boslett, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
Prescribing Breakdown
- 30-Day Fills
- 997
- Total Day Supply
- 28,762
- Generic Drug Cost
- $32K
- Opioid Claims
- 28 (3.8% rate)
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 67.9 years
- Avg HCC Risk Score
- 1.87
- Age Distribution
- <65: 17, 65-74: 24, 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 Bryn Boslett, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Biktarvy
Biktarvy
76 claims
- Triumeq
Triumeq
32 claims
- Atorvastatin Calcium
Atorvastatin Calcium
31 claims
- Lisinopril 28
Lisinopril
28 claims
- Metoprolol Succinate 24
Metoprolol Succinate
24 claims
- Genvoya 21
Genvoya
21 claims
- Duloxetine Hcl 18
Duloxetine Hcl
18 claims
- Amlodipine Besylat… 17
Amlodipine Besylate-Benazepril
17 claims
| Drug | Claims |
|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 76 |
| Triumeq Abacavir/Dolutegravir/Lamivudi | 32 |
| Atorvastatin Calcium | 31 |
| Lisinopril | 28 |
| Metoprolol Succinate | 24 |
| Genvoya Elviteg/Cob/Emtri/Tenof Alafen | 21 |
| Duloxetine Hcl | 18 |
| Amlodipine Besylate-Benazepril Amlodipine Besylate/Benazepril | 17 |
| Tivicay Dolutegravir Sodium | 15 |
| Descovy Emtricitabine/Tenofov Alafenam | 14 |
* 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 Bryn Boslett, M.D. fits within the Infectious Disease Physician landscape nationally.
Bryn Boslett, M.D.'s 737 claims are below the specialty average of 816.
Nearby Infectious Disease Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Boslett.
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 California 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.
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Frequently Asked Questions
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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