NPI registry status
Active
2026 NPPES data Anesthesiology Physician NPI 1124178884 M.D., PH.D.
Verify on CMS → Tanja Frey, M.D., PH.D.
Anesthesiology 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 56,398 in Anesthesiology 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
402
Medicare Part D claims · 58 beneficiaries · Anesthesiology Physician avg: 860
Generic prescribing
94%
generic claims · 6% 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
Tanja Frey, M.D., PH.D. filed 402 Medicare Part D claims in 2023 as a Anesthesiology Physician in Boston, Massachusetts, prescribing 94% generic.
- 402
- Part D claims, 2023
- 94%
- generic prescribing
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.
Tanja Frey, M.D., PH.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
402 Top 38% higher than 62% 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-eligible specialty (heuristic, not verified)
Tanja Frey, M.D., PH.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 Tanja Frey, M.D., PH.D.?
Quality data not reportedPrimary specialty
Anesthesiology Physician
Medicare Part D claims
402 53% vs specialty avg
Specialty distribution in Massachusetts
How Anesthesiology 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 Anesthesiology 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).
Tanja Frey, M.D., PH.D. appears in the CMS NPPES registry as a Anesthesiology Physician provider holding M.D., PH.D. credentials at 75 FRANCIS ST, Boston, MA, 02115, with a listed phone of (617) 732-8218. NPI 1124178884 was issued on 01/12/2007.
Medicare Part D records for calendar year 2023 show 402 prescription claims written by this provider, covering 58 Medicare beneficiaries and totaling roughly $29K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 56.5%.
Anesthesiology Physician is a high-volume specialty nationwide, with 56,398 enrolled providers across 56 states and an average of 860 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 | 1124178884 |
|---|---|
| Specialty | Anesthesiology Physician |
| Credentials | M.D., PH.D. |
| Gender | Female |
| NPI Issued | 01/12/2007 |
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 Tanja Frey, M.D., PH.D.. To verify Tanja Frey, M.D., PH.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
Tanja Frey, M.D., PH.D. - brand share 6.0%
Anesthesiology Physician average
6% brand-name claims vs 94% generic, on 402 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.
402
Total Claims
$29K
Total Drug Cost
58
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 422
- Total Day Supply
- 10,219
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $15K
- Generic Drug Cost
- $14K
- Opioid Claims
- 227 (56.5% rate)
Patient Demographics
- Average Patient Age
- 68.4 years
- Avg HCC Risk Score
- 1.64
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 16, 65-74: 27, 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 Tanja Frey, M.D., PH.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
91 claims
- Gabapentin
Gabapentin
72 claims
- Diclofenac Sodium
Diclofenac Sodium
45 claims
- Oxycodone Hcl 35
Oxycodone Hcl
35 claims
- Morphine Sulfate Er 22
Morphine Sulfate Er
22 claims
- Oxycodone-Acetamin… 19
Oxycodone-Acetaminophen
19 claims
- Cyclobenzaprine Hcl 16
Cyclobenzaprine Hcl
16 claims
- Acetaminophen-Code… 14
Acetaminophen-Codeine
14 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 91 |
| Gabapentin | 72 |
| Diclofenac Sodium | 45 |
| Oxycodone Hcl | 35 |
| Morphine Sulfate Er Morphine Sulfate | 22 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 19 |
| Cyclobenzaprine Hcl | 16 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 14 |
| Buprenorphine | 13 |
| Baclofen | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Anesthesiology Physician Overview
How Tanja Frey, M.D., PH.D. fits within the Anesthesiology Physician landscape nationally.
56,398
Anesthesiology Physician Providers in US
56
States with Anesthesiology Physician
860
Avg Claims per Provider
Tanja Frey, M.D., PH.D.'s 402 claims are below the specialty average of 860.
Nearby Anesthesiology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Frey.
Dr. John Abadir
M.D
Boston, MA
Matthew Abadir
Boston, MA
Dr. Sarah Abbett
M.D.
Boston, MA
Dr. Brendan Abbott
DO
Brighton, MA
Dr. Timothy Abbott
D.O.
Northampton, MA
Compare Anesthesiology 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Anesthesiology 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 Tanja Frey, M.D., PH.D.'s specialty? ▼
Tanja Frey, M.D., PH.D. specializes in Anesthesiology Physician and practices in Boston, Massachusetts. Credentials: M.D., PH.D..
How much does Tanja Frey, M.D., PH.D. prescribe under Medicare Part D? ▼
In 2023, Tanja Frey, M.D., PH.D. wrote 402 Medicare Part D claims totaling $29K in drug costs for 58 beneficiaries.
Where is Tanja Frey, M.D., PH.D. located? ▼
Tanja Frey, M.D., PH.D. is located at 75 FRANCIS ST, Boston, MA, 02115. Phone: (617) 732-8218.
What is Tanja Frey, M.D., PH.D.'s NPI number? ▼
Tanja Frey, M.D., PH.D.'s National Provider Identifier (NPI) is 1124178884, issued on 01/12/2007.
Does Tanja Frey, M.D., PH.D. prescribe more brand-name or generic drugs? ▼
Tanja Frey, M.D., PH.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $15K in brand drug costs.
Does Tanja Frey, M.D., PH.D. prescribe opioids? ▼
Yes, Tanja Frey, M.D., PH.D. had 227 opioid claims in 2023 with an opioid prescribing rate of 56.5%.
How many Anesthesiology Physician providers are there in the US? ▼
There are 56,398 Anesthesiology Physician providers across 56 states in the US. The average Anesthesiology Physician provider writes 860 Medicare Part D claims per year.
What drugs does Tanja Frey, M.D., PH.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Tanja Frey, M.D., PH.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Gabapentin, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tanja Frey, M.D., PH.D. accept Medicare? ▼
Tanja Frey, M.D., PH.D. appears in CMS Medicare data with 402 Part D claims and 58 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tanja Frey, M.D., PH.D.'s credentials? ▼
Tanja Frey, M.D., PH.D.'s NPI is 1124178884 with credentials M.D., PH.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.