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2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1659344596 M.D, PHD
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Daniel Wollman, M.D, PHD

Geriatric Medicine (Internal Medicine) Physician in Danbury, Connecticut.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,171 in Geriatric Medicine (Internal 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
12K
Medicare Part D claims · 365 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
28.1/100
▼ 55 pts below national avg 83.5 · Below average
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Daniel Wollman, M.D, PHD reported a CMS MIPS final score of 28.1/100 - below the 83.5 national average - and filed 11,561 Medicare Part D claims in 2023.

28.1/100
MIPS score · -55 vs avg
12K
Part D claims, 2023
84%
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.

CMS NPPES provider registry desk

NPI 1659344596 · Geriatric Medicine (Internal Medicine) Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-LOW · RX-HEAVY · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1659344596
  • ENUM-LEGACY 2006
  • TAX-NARROW 4,171
  • MIPS-LOW 28.1/100
  • RX-HEAVY 12K claims
  • BOOK-THIN 85 in Connecticut
  • PHOTO-FINISH Robert Feldman · ±0.1

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Daniel Wollman, M.D, PHD's MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

28 ≥ 3rd percentile 3% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). This entry sits in this band. 30–40: 2,746 measured providers (1%). Above this entry. 40–50: 2,928 measured providers (1%). Above this entry. 50–60: 5,882 measured providers (1%). Above this entry. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Daniel Wollman, M.D, PHD sits

This provider among geriatric medicine (internal medicine) physician peers

Across the 686 geriatric medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Daniel Wollman, M.D, PHD writes more Part D claims than 90% of them and scores higher on MIPS quality than 6% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 77Daniel Wollman, M.D, PHD, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 6
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one geriatric medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Daniel Wollman, M.D, PHD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Daniel Wollman, M.D, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Daniel Wollman, M.D, PHD?

Below national average

NPI registry status

Active

Issued 02/10/2006

NPI 1659344596

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,171 US NPIs in this specialty

Medicare Part D claims

11,561 160% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

MIPS final score

28.1/100 55.4 pts vs avg

Below average band

vs 83.5 national avg

Specialty distribution in Connecticut

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Connecticut providers

Connecticut providers
Clinical Social Worker8.4%Student in an Organized Heal…7.7%Physical Therapist4.2%Pharmacist3.9%Internal Medicine Physician3.4%Mental Health Counselor3.2%Geriatric Medicine (Internal…0.1%
Largest specialties in Connecticut (% of in-state providers)

Medicare quality performance, MIPS

Daniel Wollman, M.D, PHD's 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average

Below national average
MIPS Final Score
28.1/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%28.1%
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) - 28.1/100 vs national avg 83.5
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

31 STAPLES ST
Danbury, CT 06810
(203) 225-0504

Provider Details

NPI 1659344596
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials M.D, PHD
Gender Male
NPI Issued 02/10/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

28.1192
Final Score
Measured-score avg: 83.5
0
Quality
93.7305
Cost

Reporting: Individual

Brand vs generic prescribing mix · Typical

Daniel Wollman, M.D, PHD - brand share 15.0%
Geriatric Medicine (Internal Medicine) Physician average

15% brand-name claims vs 84% generic, on 11,561 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.

11,561
Total Claims
$752K
Total Drug Cost
365
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
11,593
Total Day Supply
279,250
Brand vs Generic
15% brand / 84% generic
Brand Drug Cost
$507K
Generic Drug Cost
$244K
Opioid Claims
145 (1.3% rate)
Antibiotic Claims
244

Patient Demographics

Average Patient Age
87.5 years
Avg HCC Risk Score
1.74
Gender Split
80% female / 20% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Daniel Wollman, M.D, PHD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
 561
Escitalopram Oxalate
 498
Levothyroxine Sodium
 483
Trazodone Hcl
 465
Eliquis
Apixaban
453
Amlodipine Besylate
 416
Metoprolol Tartrate
 402
Furosemide
 370
Mirtazapine
 365
Gabapentin
 272

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

More Geriatric Medicine (Internal Medicine) Physician in CT → All providers in Connecticut → Compare specialties →

Geriatric Medicine (Internal Medicine) Physician Overview

How Daniel Wollman, M.D, PHD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

Daniel Wollman, M.D, PHD's 11,561 claims are above the specialty average of 4,450.

Nationwide Geriatric Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Wollman, both outside Connecticut so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (28.1 here).

Robert Feldman 28 CA Orlando Carpio 27.9 NY Charles Benner 28.6 MD William Duke 27.5 NY

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Paul Parker Covington, LA Thomas Edmondson Baltimore, MD Bonnie Ashby Bryn Mawr, PA George Rosenthal Boston, MA

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Connecticut

Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Wollman.

One of 85 Geriatric Medicine (Internal Medicine) Physician providers enrolled in Connecticut, 5 are shown here.

Dr. Florentino Abueg
MD
Southbury, CT
Dr. Joseph Agostini
MD
New Haven, CT
Dr. Amir Ahmad
MD
Norwich, CT
Dr. Olusegun Apoeso
MD
West Hartford, CT
Dr. Thomas Ashley
MD
Stamford, CT

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Daniel Wollman, M.D, PHD's specialty? ▼
Daniel Wollman, M.D, PHD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Danbury, Connecticut. Credentials: M.D, PHD.
How much does Daniel Wollman, M.D, PHD prescribe under Medicare Part D? ▼
In 2023, Daniel Wollman, M.D, PHD wrote 11,561 Medicare Part D claims totaling $752K in drug costs for 365 beneficiaries.
What is Daniel Wollman, M.D, PHD's Medicare quality score? ▼
Daniel Wollman, M.D, PHD has a CMS MIPS Final Score of 28.1/100 (Quality: 0, Cost: 93.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Daniel Wollman, M.D, PHD located? ▼
Daniel Wollman, M.D, PHD is located at 31 STAPLES ST, Danbury, CT, 06810. Phone: (203) 225-0504.
What is Daniel Wollman, M.D, PHD's NPI number? ▼
Daniel Wollman, M.D, PHD's National Provider Identifier (NPI) is 1659344596, issued on 02/10/2006.
Does Daniel Wollman, M.D, PHD prescribe more brand-name or generic drugs? ▼
Daniel Wollman, M.D, PHD's prescribing is 15% brand-name and 84% generic drugs by claim count, with $507K in brand drug costs.
Does Daniel Wollman, M.D, PHD prescribe opioids? ▼
Yes, Daniel Wollman, M.D, PHD had 145 opioid claims in 2023 with an opioid prescribing rate of 1.3%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Daniel Wollman, M.D, PHD prescribe most often? ▼
Based on 2023 Medicare Part D data, Daniel Wollman, M.D, PHD's most frequently prescribed drugs include Atorvastatin Calcium, Escitalopram Oxalate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Daniel Wollman, M.D, PHD accept Medicare? ▼
Daniel Wollman, M.D, PHD appears in CMS Medicare data with 11,561 Part D claims and 365 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Daniel Wollman, M.D, PHD's credentials? ▼
Daniel Wollman, M.D, PHD's NPI is 1659344596 with credentials M.D, PHD. 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.
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

Compiled from official public sources by the editorial process.

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.