2026 NPPES data Rheumatology Physician NPI 1598865909 MD
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THOMAS BARTOW, MD

Rheumatology Physician in MARSHFIELD, Wisconsin. 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
5K
Medicare Part D claims · 766 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.8552/100
▼ 4 pts below national avg 83.1 · [object Object]

What the federal data shows

THOMAS BARTOW, MD reported a CMS MIPS final score of 78.8552/100 — below the 83.1 national average — and filed 4,561 Medicare Part D claims in 2023.

78.8552/100
MIPS score · -4 vs avg
5K
Part D claims, 2023
86%
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.

THOMAS BARTOW, MD's MIPS score vs every scored U.S. clinician

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

79 27th percentile higher than 27% 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%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 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)

THOMAS BARTOW, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — 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 THOMAS BARTOW, MD?

Near national average

NPI registry status

Active

Issued 09/25/2006

NPI 1598865909

Primary specialty

Rheumatology Physician

Mid-sized

6,181 US NPIs in this specialty

Medicare Part D claims

4,561 122% vs specialty avg

2023 prescription claims

Specialty avg: 2,054

MIPS final score

78.8552/100 4.244799999999998% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Wisconsin

How Rheumatology Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Rheumatology Physician share within Wisconsin

1. Rheumatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Rheumatology Physician share within Wisconsin

Medicare quality performance — MIPS

THOMAS BARTOW, MD's 2023 MIPS final score plotted against the Rheumatology Physician national average

Near national average
MIPS Final Score
78.8552/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Rheumatology Physician) — 78.8552/100 vs national avg 83.1

0%100%National avg83%78.9%
MIPS final score (Rheumatology Physician) — 78.8552/100 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).

THOMAS BARTOW, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 1000 N OAK AVE, MARSHFIELD, WI, 54449, with a listed phone of (715) 387-5511. NPI 1598865909 was issued on 09/25/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BARTOW 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 4,561 prescription claims written by this provider, covering 766 Medicare beneficiaries and totaling roughly $3.3 million in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 5.8%. 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 78.8552/100 for the 2023 performance year (Quality 66.6851, Cost 54.8733), compared with the national average of 83.1.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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

1000 N OAK AVE
MARSHFIELD, WI 54449

Provider Details

NPI 1598865909
Specialty Rheumatology Physician
Credentials MD
Gender Male
NPI Issued 09/25/2006

CMS Quality Score (MIPS)

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

78.8552
Final Score
Avg: 83.1
66.6851
Quality
54.8733
Cost
99
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where THOMAS BARTOW, 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.

MARSHFIELD CLINIC INC
EAU CLAIRE, WI

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Typical

THOMAS BARTOW, MD — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 4,561 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.

4,561
Total Claims
$3.3M
Total Drug Cost
766
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
9,185
Total Day Supply
270,809
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$3.2M
Generic Drug Cost
$111K
Opioid Claims
264 (5.8% rate)

Patient Demographics

Average Patient Age
71.6 years
Avg HCC Risk Score
1.42
Gender Split
64% female / 36% male
Age Distribution
<65: 107, 65-74: 362, 75-84: 245, 85+: 52

Top Prescribed Drugs (Medicare Part D)

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

What THOMAS BARTOW, MD 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
Prednisone
932
Methotrexate
Methotrexate Sodium
823
Hydroxychloroquine Sulfate
380
Meloxicam
362
Leflunomide
126
Tramadol Hcl
122
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
112
Alendronate Sodium
105
Allopurinol
97
Gabapentin
89

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

Rheumatology Physician Overview

How THOMAS BARTOW, MD fits within the Rheumatology Physician landscape nationally.

6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider

THOMAS BARTOW, MD's 4,561 claims are above the specialty average of 2,054.

Nearby Rheumatology Physician Providers in Wisconsin

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

Compare Rheumatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS BARTOW, MD's specialty?
THOMAS BARTOW, MD specializes in Rheumatology Physician and practices in MARSHFIELD, Wisconsin. Credentials: MD.
How much does THOMAS BARTOW, MD prescribe under Medicare Part D?
In 2023, THOMAS BARTOW, MD wrote 4,561 Medicare Part D claims totaling $3.3M in drug costs for 766 beneficiaries.
What is THOMAS BARTOW, MD's Medicare quality score?
THOMAS BARTOW, MD has a CMS MIPS Final Score of 78.8552/100 (Quality: 66.6851, Cost: 54.8733). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is THOMAS BARTOW, MD located?
THOMAS BARTOW, MD is located at 1000 N OAK AVE, MARSHFIELD, WI, 54449. Phone: (715) 387-5511.
What is THOMAS BARTOW, MD's NPI number?
THOMAS BARTOW, MD's National Provider Identifier (NPI) is 1598865909, issued on 09/25/2006.
Does THOMAS BARTOW, MD prescribe more brand-name or generic drugs?
THOMAS BARTOW, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $3.2M in brand drug costs.
Does THOMAS BARTOW, MD prescribe opioids?
Yes, THOMAS BARTOW, MD had 264 opioid claims in 2023 with an opioid prescribing rate of 5.8%.
How many Rheumatology Physician providers are there in the US?
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does THOMAS BARTOW, MD prescribe most often?
Based on 2023 Medicare Part D data, THOMAS BARTOW, MD's most frequently prescribed drugs include Prednisone, Methotrexate, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS BARTOW, MD accept Medicare?
THOMAS BARTOW, MD appears in CMS Medicare data with 4,561 Part D claims and 766 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS BARTOW, MD's credentials?
THOMAS BARTOW, MD's NPI is 1598865909 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

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