Nath Chongsuwat, M.D.
NPI 1225416829 · Hospitalist Physician · Weston, WI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nath Chongsuwat, M.D. is a Hospitalist Physician provider in Weston, WI (NPI 1225416829).
Provider details
- NPI number
- 1225416829
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 471-320 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
750 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 343 | $117 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 145 | $111 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 126 | $167 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 100 | $77 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 20 | $49 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 26 | 14 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 24 | 22 |
| Metoprolol Succinate | 23 | 13 |
| Atorvastatin Calcium | 18 | — |
| Prednisone | 18 | 16 |
| Apixabanbrand: Eliquis | 16 | — |
| Spironolactone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$59 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 121 S Wilke Rd Ste 606Arlington Heights, IL 60005-1529Phone: (224) 400-1751
- 3 Erie Ct Ste L700Oak Park, IL 60302-2519Phone: (708) 763-1222Fax: (708) 763-1471
- 9576 Hwy 70Minocqua, WI 54548-9067Phone: (715) 358-1000
Registry dates
- Enumerated
- 2015-05-14
- Last updated
- 2026-04-17
- Certified
- 2026-04-17
Frequently asked questions
- What is Nath Chongsuwat's NPI number?
- Nath Chongsuwat's National Provider Identifier (NPI) is 1225416829, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nath Chongsuwat's specialty?
- Nath Chongsuwat is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Nath Chongsuwat located?
- Nath Chongsuwat's practice location on file with NPPES is 3400 Ministry Pkwy, Weston, WI 54476-5220.
- What is Nath Chongsuwat's phone number?
- The practice phone number listed in the NPPES registry for Nath Chongsuwat is (715) 358-1000.
- Does Nath Chongsuwat accept Medicare?
- Nath Chongsuwat is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nath Chongsuwat's NPI active?
- Yes — Nath Chongsuwat's NPI (1225416829) is active in the NPPES registry as of the last update on 2026-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.