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. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
12K
Medicare Part D claims · 365 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
28.1192/100
▼ 55 pts below national avg 83.1 · [object Object]

What the federal data shows

DANIEL WOLLMAN, M.D, PHD reported a CMS MIPS final score of 28.1192/100 — below the 83.1 national average — and filed 11,561 Medicare Part D claims in 2023.

28.1192/100
MIPS score · -55 vs avg
12K
Part D claims, 2023
85%
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.

DANIEL WOLLMAN, M.D, PHD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

28 3rd percentile higher than 3% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). This entry sits in this band. 30–40: 2,746 scored providers (1%). Above this entry. 40–50: 2,928 scored providers (1%). Above this entry. 50–60: 5,882 scored providers (1%). Above this entry. 60–70: 13,906 scored providers (3%). Above this entry. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

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

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

4,161 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

28.1192/100 54.980799999999995% pts

Below average band

vs 83.1 national avg

Specialty distribution in Connecticut

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

Connecticut providers

Geriatric Medicine (Internal Medicine) Physician share within Connecticut

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Connecticut

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
28.1192/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Geriatric Medicine (Internal Medicine) Physician) — 28.1192/100 vs national avg 83.1

0%100%National avg83%28.1%
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) — 28.1192/100 vs national avg 83.1

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).

DANIEL WOLLMAN, M.D, PHD is a Geriatric Medicine (Internal Medicine) Physician provider practicing in DANBURY, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D, PHD. NPI: 1659344596. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

DANIEL WOLLMAN, M.D, PHD appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D, PHD credentials at 31 STAPLES ST, DANBURY, CT, 06810, with a listed phone of (203) 225-0504. NPI 1659344596 was issued on 02/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WOLLMAN 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 11,561 prescription claims written by this provider, covering 365 Medicare beneficiaries and totaling roughly $752K in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 1.3%. 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 28.1192/100 for the 2023 performance year (Quality 0, Cost 93.7305), compared with the national average of 83.1.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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

31 STAPLES ST
DANBURY, CT 06810

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
Avg: 83.1
0
Quality
93.7305
Cost

Reporting: Individual

Brand vs generic prescribing mix · Typical

DANIEL WOLLMAN, M.D, PHD — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% 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 / 85% 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.

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.

Geriatric Medicine (Internal Medicine) Physician Overview

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

4,161
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.

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.

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 28.1192/100 (Quality: 0, Cost: 93.7305). The national average MIPS Final Score is 83.1. 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 85% 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 4,161 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

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