Nathan Demchuk, DO
NPI 1114380540 · Internal Medicine Physician · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Demchuk, DO is a Internal Medicine Physician provider in Kalamazoo, MI (NPI 1114380540).
Provider details
- NPI number
- 1114380540
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101027202 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
448 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $93 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 71 | $75 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 45 | $128 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 40 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $63 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 204 | 79 |
| Gabapentin | 111 | 36 |
| Levothyroxine Sodium | 107 | 40 |
| Losartan Potassium | 102 | 34 |
| Amlodipine Besylate | 100 | 43 |
| Lisinopril | 69 | 24 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$202 across 10 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 (1)
- 1000 Oakland DrKalamazoo, MI 49008-1282Phone: (269) 337-4600
Registry dates
- Enumerated
- 2016-04-02
- Last updated
- 2023-08-21
- Certified
- 2023-08-21
Frequently asked questions
- What is Nathan Demchuk's NPI number?
- Nathan Demchuk's National Provider Identifier (NPI) is 1114380540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Demchuk's specialty?
- Nathan Demchuk is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Demchuk located?
- Nathan Demchuk's practice location on file with NPPES is 601 John St Ste M-170, Kalamazoo, MI 49007-5366.
- What is Nathan Demchuk's phone number?
- The practice phone number listed in the NPPES registry for Nathan Demchuk is (269) 381-5060.
- Does Nathan Demchuk accept Medicare?
- Nathan Demchuk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Demchuk's NPI active?
- Yes — Nathan Demchuk's NPI (1114380540) is active in the NPPES registry as of the last update on 2023-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.