Michael Portner, MD
NPI 1659439867 · Nephrology Physician · Cleveland, MS
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Portner, MD is a Nephrology Physician provider in Cleveland, MS (NPI 1659439867).
Provider details
- NPI number
- 1659439867
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 09174 (MS)
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
19 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
1,115 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) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 440 | $296 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 195 | $42 |
| Hemodialysis Procedure With Physician Evaluation90935 | 190 | $60 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 92 | $46 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 85 | $14 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 189 | 48 |
| Sucroferric Oxyhydroxidebrand: Velphoro | 121 | 23 |
| Ferric Citratebrand: Auryxia | 98 | 23 |
| Amlodipine Besylate | 63 | 17 |
| Calcium Acetate | 38 | — |
| Ciprofloxacin Hcl | 35 | 18 |
| Gabapentin | 33 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Portner's NPI number?
- Michael Portner's National Provider Identifier (NPI) is 1659439867, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Portner's specialty?
- Michael Portner is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Portner located?
- Michael Portner's practice location on file with NPPES is 803 First Street, Cleveland, MS 38732.
- What is Michael Portner's phone number?
- The practice phone number listed in the NPPES registry for Michael Portner is (662) 843-2721.
- Does Michael Portner accept Medicare?
- Michael Portner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Portner's NPI active?
- Yes — Michael Portner's NPI (1659439867) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.