Crystal Marsh-Koca, D.O.
NPI 1528472123 · Internal Medicine Physician · Warren, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Crystal Marsh-Koca, D.O. is a Internal Medicine Physician provider in Warren, MI (NPI 1528472123).
Provider details
- NPI number
- 1528472123
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 5101021322 (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
12 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
1,256 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 35 Minutes99232 | 366 | $80 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 202 | $68 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 166 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 92 | $175 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 89 | $129 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 193 | 73 |
| Apixabanbrand: Eliquis | 113 | 41 |
| Atorvastatin Calcium | 103 | 39 |
| Rosuvastatin Calcium | 87 | 37 |
| Isosorbide Mononitratebrand: Isosorbide Mononitrate Er | 63 | 29 |
| Metoprolol Tartrate | 63 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$247 across 8 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
- 2014-06-12
- Last updated
- 2025-11-18
- Certified
- 2025-11-18
Frequently asked questions
- What is Crystal Marsh-Koca's NPI number?
- Crystal Marsh-Koca's National Provider Identifier (NPI) is 1528472123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Crystal Marsh-Koca's specialty?
- Crystal Marsh-Koca is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Crystal Marsh-Koca located?
- Crystal Marsh-Koca's practice location on file with NPPES is 11885 E 12 Mile Rd Ste 300a, Warren, MI 48093-3467.
- What is Crystal Marsh-Koca's phone number?
- The practice phone number listed in the NPPES registry for Crystal Marsh-Koca is (586) 582-6630.
- Does Crystal Marsh-Koca accept Medicare?
- Crystal Marsh-Koca is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Crystal Marsh-Koca's NPI active?
- Yes — Crystal Marsh-Koca's NPI (1528472123) is active in the NPPES registry as of the last update on 2025-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.