J Mark Joliat, MD
NPI 1780645143 · Internal Medicine Physician · Troy, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
J Mark Joliat, MD is a Internal Medicine Physician provider in Troy, MI (NPI 1780645143).
Provider details
- NPI number
- 1780645143
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 040407 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,293 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 | 613 | $131 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 600 | $9 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 564 | $8 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 561 | $8 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 494 | $13 |
| Hemoglobin A1c Level83036 | 456 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 113 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 419 | 118 |
| Losartan Potassium | 376 | 99 |
| Metoprolol Succinate | 327 | 87 |
| Rosuvastatin Calcium | 266 | 70 |
| Levothyroxine Sodium | 262 | 67 |
| Ezetimibe | 253 | 75 |
| Alprazolam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$706 across 14 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
- 2006-03-28
- Last updated
- 2018-01-24
Frequently asked questions
- What is J Mark Joliat's NPI number?
- J Mark Joliat's National Provider Identifier (NPI) is 1780645143, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is J Mark Joliat's specialty?
- J Mark Joliat is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is J Mark Joliat located?
- J Mark Joliat's practice location on file with NPPES is 4600 Investment Dr, Troy, MI 48098-6365.
- What is J Mark Joliat's phone number?
- The practice phone number listed in the NPPES registry for J Mark Joliat is (248) 267-5000.
- Does J Mark Joliat accept Medicare?
- J Mark Joliat is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is J Mark Joliat's NPI active?
- Yes — J Mark Joliat's NPI (1780645143) is active in the NPPES registry as of the last update on 2018-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.