Christopher Isham, MD
NPI 1265921753 · Internal Medicine Physician · Ferndale, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Isham, MD is a Internal Medicine Physician provider in Ferndale, MI (NPI 1265921753).
Provider details
- NPI number
- 1265921753
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301506885 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 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
292 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 86 | $79 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 50 | $120 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $102 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 43 | $170 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 27 | $81 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 74 | 24 |
| Atorvastatin Calcium | 74 | 24 |
| Losartan Potassium | 52 | 20 |
| Lisinopril | 49 | 13 |
| Tamsulosin Hcl | 33 | 14 |
| Metoprolol Succinate | 27 | — |
| Dapagliflozin Propanediol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-05-09
- Last updated
- 2024-02-15
- Certified
- 2024-02-15
Frequently asked questions
- What is Christopher Isham's NPI number?
- Christopher Isham's National Provider Identifier (NPI) is 1265921753, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Isham's specialty?
- Christopher Isham is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Isham located?
- Christopher Isham's practice location on file with NPPES is 221 W Troy St Ste 400, Ferndale, MI 48220-3903.
- What is Christopher Isham's phone number?
- The practice phone number listed in the NPPES registry for Christopher Isham is (248) 844-6100.
- Does Christopher Isham accept Medicare?
- Christopher Isham is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Isham's NPI active?
- Yes — Christopher Isham's NPI (1265921753) is active in the NPPES registry as of the last update on 2024-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.