NPI registry status
Active
2026 NPPES data Public Health & General Preventive Medicine Physician NPI 1154341576 M.D.
Verify on CMS → Joan Katz, M.D.
Public Health & General Preventive Medicine Physician in Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,799 in Public Health & General Preventive Medicine 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
155
Medicare Part D claims · 38 beneficiaries · Public Health & General Preventive Medicine Physician avg: 944
Generic prescribing
93%
generic claims · 7% 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
Joan Katz, M.D. filed 155 Medicare Part D claims in 2024 as a Public Health & General Preventive Medicine Physician in Boston, Massachusetts, prescribing 93% generic.
- 155
- Part D claims, 2024
- 93%
- generic prescribing
- ≥34th
- 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 Joan Katz, 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 1154341576), first enumerated 07/20/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 155 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Joan Katz, M.D.'s individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- 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.
CMS NPPES provider registry desk
NPI 1154341576 · Public Health & General Preventive Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1154341576
- ENUM-LEGACY 2006
- TAX-NARROW 1,799
- RX-LIGHT 155
- BOOK-THIN 52 in Massachusetts
- PHOTO-ENUM Maribeth Quinn · 2006
Joan Katz, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
155 ≥ 34th percentile 34% 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-eligible specialty (heuristic, not verified)
Joan Katz, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Joan Katz, M.D.?
Quality data not reportedPrimary specialty
Public Health & General Preventive Medicine Physician
Medicare Part D claims
155 84% vs specialty avg
Specialty distribution in Massachusetts
How Public Health & General Preventive Medicine Physician compares to other specialties among Massachusetts 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 Public Health & General Preventive Medicine 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 | 1154341576 |
|---|---|
| Specialty | Public Health & General Preventive Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 07/20/2006 |
License & disciplinary context - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Joan Katz, M.D.. To verify Joan Katz, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Joan Katz, M.D. - brand share 7.0%
Public Health & General Preventive Medicine Physician average
7% brand-name claims vs 93% generic, on 155 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.
155
Total Claims
$22K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 323.433
- Total Day Supply
- 9,588
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $17K
- Generic Drug Cost
- $5K
Patient Demographics
- Average Patient Age
- 62.2 years
- Avg HCC Risk Score
- 0.59
- Age Distribution
- <65: 12, 65-74: 22, 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 Joan Katz, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Dutasteride
Dutasteride
74 claims
- Ketoconazole 15
Ketoconazole
15 claims
- Valacyclovir 11
Valacyclovir
11 claims
| Drug | Claims |
|---|---|
| Dutasteride | 74 |
| Ketoconazole | 15 |
| Valacyclovir Valacyclovir Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Public Health & General Preventive Medicine Physician in MA →
All providers in Massachusetts →
Compare specialties →
Public Health & General Preventive Medicine Physician Overview
How Joan Katz, M.D. fits within the Public Health & General Preventive Medicine Physician landscape nationally.
1,799
Public Health & General Preventive Medicine Physician Providers in US
52
States with Public Health & General Preventive Medicine Physician
944
Avg Claims per Provider
Joan Katz, M.D.'s 155 claims are below the specialty average of 944.
Nationwide Public Health & General Preventive Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Katz, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Public Health & General Preventive Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Katz.
One of 52 Public Health & General Preventive Medicine Physician providers enrolled in Massachusetts, 5 are shown here.
Frequently Asked Questions
What is Joan Katz, M.D.'s specialty? ▼
Joan Katz, M.D. specializes in Public Health & General Preventive Medicine Physician and practices in Boston, Massachusetts. Credentials: M.D..
How much does Joan Katz, M.D. prescribe under Medicare Part D? ▼
In 2024, Joan Katz, M.D. wrote 155 Medicare Part D claims totaling $22K in drug costs for 38 beneficiaries.
Where is Joan Katz, M.D. located? ▼
Joan Katz, M.D. is located at 65 E INDIA ROW, Boston, MA, 02110. Phone: (617) 367-8887.
What is Joan Katz, M.D.'s NPI number? ▼
Joan Katz, M.D.'s National Provider Identifier (NPI) is 1154341576, issued on 07/20/2006.
Does Joan Katz, M.D. prescribe more brand-name or generic drugs? ▼
Joan Katz, M.D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $17K in brand drug costs.
How many Public Health & General Preventive Medicine Physician providers are there in the US? ▼
There are 1,799 Public Health & General Preventive Medicine Physician providers across 52 states in the US. The average Public Health & General Preventive Medicine Physician provider writes 944 Medicare Part D claims per year.
What drugs does Joan Katz, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Joan Katz, M.D.'s most frequently prescribed drugs include Dutasteride, Ketoconazole, Valacyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Joan Katz, M.D. accept Medicare? ▼
Joan Katz, M.D. appears in CMS Medicare data with 155 Part D claims and 38 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Joan Katz, M.D.'s credentials? ▼
Joan Katz, M.D.'s NPI is 1154341576 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.