2026 NPPES data Internal Medicine Physician NPI 1164438040 MD
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Thomas Wald, MD

Internal Medicine Physician in Wausau, Wisconsin. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in 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
1K
Medicare Part D claims · 260 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
33%
generic claims · 67% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$68.53
3 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Thomas Wald, MD filed 1,417 Medicare Part D claims in 2023 as a Internal Medicine Physician in Wausau, Wisconsin, prescribing 33% generic.

1K
Part D claims, 2023
33%
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 Wald, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

1,417 Top 20% higher than 80% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). This entry sits in this band. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

Thomas Wald, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Wald, MD?

Quality data not reported

NPI registry status

Active

Issued 07/31/2006

NPI 1164438040

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

1,417 48% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Wisconsin

How Internal Medicine Physician compares to other specialties among Wisconsin providers

Wisconsin providers

Largest specialties in Wisconsin (% of in-state providers)

Physical Therapist - 5.6%Physical Therapist5.6%Pharmacist - 4.8%Pharmacist4.8%Registered Nurse - 4.5%Registered Nurse4.5%Professional Counselor - 3.3%Professional Counselor3.3%Student in an Organized Health Care Education/Training Program - 3.3%Student in an Organized Health Care Education/Training Program3.3%Family Medicine Physician - 3.2%Family Medicine Physician3.2%Internal Medicine Physician - 2.5%Internal Medicine Physician2.5%
Largest specialties in Wisconsin (% of in-state 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 Internal Medicine Physician. Verify directly:

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 Wald, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 425 PINE RIDGE BLVD, Wausau, WI, 54401, with a listed phone of (715) 847-2480. NPI 1164438040 was issued on 07/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Wald 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 1,417 prescription claims written by this provider, covering 260 Medicare beneficiaries and totaling roughly $732K in drug spend, split 67% brand-name and 33% generic by claim count. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

425 PINE RIDGE BLVD
Wausau, WI 54401

Provider Details

NPI 1164438040
Specialty Internal Medicine Physician
Credentials MD
Gender Male
NPI Issued 07/31/2006

Hospital and facility affiliations

Facilities where Thomas Wald, 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.

Fox Valley Pulmonary Medicine SC
Appleton, 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).

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 Thomas Wald, MD. Source: openpaymentsdata.cms.gov.

Total received

$69

Largest payer

GlaxoSmithKline, LLC.

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 · Brand-heavy

Thomas Wald, MD - brand share 67.0%
Internal Medicine Physician average

67% brand-name claims vs 33% generic, on 1,417 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.

1,417
Total Claims
$732K
Total Drug Cost
260
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,158
Total Day Supply
61,816
Brand vs Generic
67% brand / 33% generic
Brand Drug Cost
$637K
Generic Drug Cost
$95K
Antibiotic Claims
29

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
2.06
Gender Split
58% female / 42% male
Age Distribution
<65: 30, 65-74: 114, 75-84: 97, 85+: 19

Top Prescribed Drugs (Medicare Part D)

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

What Thomas Wald, 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
Albuterol Sulfate Hfa
Albuterol Sulfate
229
Anoro Ellipta
Umeclidinium Brm/Vilanterol Tr
161
Fluticasone-Salmeterol
Fluticasone Propion/Salmeterol
113
Breo Ellipta
Fluticasone/Vilanterol
95
Montelukast Sodium
94
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
87
Stiolto Respimat
Tiotropium Br/Olodaterol Hcl
86
Symbicort
Budesonide/Formoterol Fumarate
37
Spiriva Handihaler
Tiotropium Bromide
31
Budesonide-Formoterol Fumarate
Budesonide/Formoterol Fumarate
30

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

Internal Medicine Physician Overview

How Thomas Wald, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

Thomas Wald, MD's 1,417 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Wisconsin

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

Compare Internal Medicine 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine 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.

Frequently Asked Questions

What is Thomas Wald, MD's specialty?
Thomas Wald, MD specializes in Internal Medicine Physician and practices in Wausau, Wisconsin. Credentials: MD.
How much does Thomas Wald, MD prescribe under Medicare Part D?
In 2023, Thomas Wald, MD wrote 1,417 Medicare Part D claims totaling $732K in drug costs for 260 beneficiaries.
Where is Thomas Wald, MD located?
Thomas Wald, MD is located at 425 PINE RIDGE BLVD, Wausau, WI, 54401. Phone: (715) 847-2480.
What is Thomas Wald, MD's NPI number?
Thomas Wald, MD's National Provider Identifier (NPI) is 1164438040, issued on 07/31/2006.
Does Thomas Wald, MD prescribe more brand-name or generic drugs?
Thomas Wald, MD's prescribing is 67% brand-name and 33% generic drugs by claim count, with $637K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Thomas Wald, MD prescribe most often?
Based on 2023 Medicare Part D data, Thomas Wald, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Anoro Ellipta, Fluticasone-Salmeterol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Wald, MD accept Medicare?
Thomas Wald, MD appears in CMS Medicare data with 1,417 Part D claims and 260 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Wald, MD's credentials?
Thomas Wald, MD's NPI is 1164438040 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.
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.