Carl Christensen, MD
NPI 1598703621 · Addiction Medicine (Family Medicine) Physician · Ypsilanti, MI
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carl Christensen, MD is a Addiction Medicine (Family Medicine) Physician provider in Ypsilanti, MI (NPI 1598703621).
Provider details
- NPI number
- 1598703621
- Entity type
- Individual
- Primary specialty
- Addiction Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301048048 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
87 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 72 | $110 |
| Testing for Presence of Drug, Read By Direct Observation80305 | 15 | $10 |
Typical Medicare-allowed amounts for these services range $10–$110 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 201 | 22 |
| Gabapentin | 58 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 54 | — |
| Morphine Sulfate | 25 | — |
| Tramadol Hcl | 17 | — |
| Buprenorphine Hcl | 16 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-02
- Last updated
- 2012-11-07
Frequently asked questions
- What is Carl Christensen's NPI number?
- Carl Christensen's National Provider Identifier (NPI) is 1598703621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Christensen's specialty?
- Carl Christensen is listed in the NPPES registry with a primary specialty of Addiction Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Carl Christensen located?
- Carl Christensen's practice location on file with NPPES is 4870 W Clark Rd Ste 201, Ypsilanti, MI 48197-1104.
- What is Carl Christensen's phone number?
- The practice phone number listed in the NPPES registry for Carl Christensen is (734) 434-6600.
- Does Carl Christensen accept Medicare?
- Carl Christensen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carl Christensen's NPI active?
- Yes — Carl Christensen's NPI (1598703621) is active in the NPPES registry as of the last update on 2012-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.