Johnathon Markus, M.D.
NPI 1548521461 · Hospitalist Physician · Clinton Twp, MI
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johnathon Markus, M.D. is a Hospitalist Physician provider in Clinton Twp, MI (NPI 1548521461).
Provider details
- NPI number
- 1548521461
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
453 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 90 | $275 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 80 | $53 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 73 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $96 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 48 | $185 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 376 | 109 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 119 | 116 |
| Linaclotidebrand: Linzess | 90 | 34 |
| Omeprazole | 88 | 34 |
| Sucralfate | 69 | 35 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 60 | 11 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,726 across 174 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
Registry dates
- Enumerated
- 2012-06-06
- Last updated
- 2019-04-23
Frequently asked questions
- What is Johnathon Markus's NPI number?
- Johnathon Markus's National Provider Identifier (NPI) is 1548521461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johnathon Markus's specialty?
- Johnathon Markus is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Johnathon Markus located?
- Johnathon Markus's practice location on file with NPPES is 37399 Garfield Rd Ste 104, Clinton Twp, MI 48036-3672.
- What is Johnathon Markus's phone number?
- The practice phone number listed in the NPPES registry for Johnathon Markus is (586) 569-3379.
- Does Johnathon Markus accept Medicare?
- Johnathon Markus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Johnathon Markus's NPI active?
- Yes — Johnathon Markus's NPI (1548521461) is active in the NPPES registry as of the last update on 2019-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.