NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1699811547 MD
Verify on CMS → Michael Buff, MD
Hematology & Oncology Physician in Concord, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,232 in Hematology & Oncology 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
693
Medicare Part D claims · 166 beneficiaries · Hematology & Oncology Physician avg: 847
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$226.28
3 payments · CMS Open Payments (Sunshine Act)
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
Michael Buff, MD filed 693 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in Concord, New Hampshire, prescribing 92% generic.
- 693
- Part D claims, 2023
- 92%
- 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.
Michael Buff, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
693 Top 31% higher than 69% 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)
Michael Buff, MD 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 Michael Buff, MD?
Quality data not reportedPrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
693 18% vs specialty avg
Specialty distribution in New Hampshire
How Hematology & Oncology Physician compares to other specialties among New Hampshire 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 Hematology & Oncology 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).
Michael Buff, MD appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding MD credentials at 250 PLEASANT ST, Concord, NH, 03301, with a listed phone of (036) 226-4846. NPI 1699811547 was issued on 01/29/2007.
Medicare Part D records for calendar year 2023 show 693 prescription claims written by this provider, covering 166 Medicare beneficiaries and totaling roughly $509K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 5.9%.
Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,232 enrolled providers across 54 states and an average of 847 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 | 1699811547 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/29/2007 |
Hospital and facility affiliations
Facilities where Michael Buff, MD 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.
Elliot Professional Services
Manchester, NH
New Hampshire Oncology-Hematology PA
Concord, NH
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Michael Buff, MD. Source: openpaymentsdata.cms.gov.
Total received
$226
Largest payer
AstraZeneca Pharmaceuticals LP
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Generic-heavy
Michael Buff, MD - brand share 8.0%
Hematology & Oncology Physician average
8% brand-name claims vs 92% generic, on 693 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.
693
Total Claims
$509K
Total Drug Cost
166
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,113
- Total Day Supply
- 30,704
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $312K
- Generic Drug Cost
- $197K
- Opioid Claims
- 41 (5.9% rate)
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 73.6 years
- Avg HCC Risk Score
- 1.76
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Buff, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Letrozole
Letrozole
103 claims
- Dexamethasone
Dexamethasone
61 claims
- Prednisone
Prednisone
43 claims
- Sulfamethoxazole-T… 40
Sulfamethoxazole-Trimethoprim
40 claims
- Tamoxifen Citrate 36
Tamoxifen Citrate
36 claims
- Abiraterone Acetate 32
Abiraterone Acetate
32 claims
- Olanzapine 30
Olanzapine
30 claims
- Potassium Chloride 28
Potassium Chloride
28 claims
| Drug | Claims |
|---|---|
| Letrozole | 103 |
| Dexamethasone | 61 |
| Prednisone | 43 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 40 |
| Tamoxifen Citrate | 36 |
| Abiraterone Acetate | 32 |
| Olanzapine | 30 |
| Potassium Chloride | 28 |
| Pantoprazole Sodium | 23 |
| Anastrozole | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How Michael Buff, MD fits within the Hematology & Oncology Physician landscape nationally.
11,232
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider
Michael Buff, MD's 693 claims are below the specialty average of 847.
Nearby Hematology & Oncology Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Buff.
Dr. Elizabeth Bengtson
MD
Lebanon, NH
Dr. Amy Bessnow
MD
Dover, NH
Dr. Archana Bhargava
MD
Dover, NH
Dr. Eric Bonnem
MD
Manchester, NH
Dr. Frederick Briccetti
MD
Concord, NH
Compare Hematology & Oncology 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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hematology & Oncology 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 Michael Buff, MD's specialty? ▼
Michael Buff, MD specializes in Hematology & Oncology Physician and practices in Concord, New Hampshire. Credentials: MD.
How much does Michael Buff, MD prescribe under Medicare Part D? ▼
In 2023, Michael Buff, MD wrote 693 Medicare Part D claims totaling $509K in drug costs for 166 beneficiaries.
Where is Michael Buff, MD located? ▼
Michael Buff, MD is located at 250 PLEASANT ST, Concord, NH, 03301. Phone: (036) 226-4846.
What is Michael Buff, MD's NPI number? ▼
Michael Buff, MD's National Provider Identifier (NPI) is 1699811547, issued on 01/29/2007.
Does Michael Buff, MD prescribe more brand-name or generic drugs? ▼
Michael Buff, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $312K in brand drug costs.
Does Michael Buff, MD prescribe opioids? ▼
Yes, Michael Buff, MD had 41 opioid claims in 2023 with an opioid prescribing rate of 5.9%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,232 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does Michael Buff, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Buff, MD's most frequently prescribed drugs include Letrozole, Dexamethasone, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Buff, MD accept Medicare? ▼
Michael Buff, MD appears in CMS Medicare data with 693 Part D claims and 166 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Buff, MD's credentials? ▼
Michael Buff, MD's NPI is 1699811547 with credentials MD. 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.