Robert Isom, M.D.
NPI 1356428072 · Nephrology Physician · Portland, ME
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Isom, M.D. is a Nephrology Physician provider in Portland, ME (NPI 1356428072).
Provider details
- NPI number
- 1356428072
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD25822 (ME)
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 tenure25% of score
19 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
1,565 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 491 | $86 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 245 | $122 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 148 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 128 | $9 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 122 | $184 |
| Kidney Function Blood Test Panel80069 | 70 |
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 |
|---|---|---|
| Empagliflozinbrand: Jardiance | 158 | 36 |
| Amlodipine Besylate | 158 | 47 |
| Calcitriol | 99 | 20 |
| Losartan Potassium | 73 | 20 |
| Famotidine | 59 | 13 |
| Chlorthalidone | 57 | 19 |
| Telmisartan | 52 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$854 across 35 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
- 2006-11-01
- Last updated
- 2022-05-24
- Certified
- 2022-05-24
Frequently asked questions
- What is Robert Isom's NPI number?
- Robert Isom's National Provider Identifier (NPI) is 1356428072, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Isom's specialty?
- Robert Isom is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Isom located?
- Robert Isom's practice location on file with NPPES is 1600 Congress St Ste B, Portland, ME 04102-2148.
- What is Robert Isom's phone number?
- The practice phone number listed in the NPPES registry for Robert Isom is (207) 774-5222.
- Does Robert Isom accept Medicare?
- Robert Isom is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Isom's NPI active?
- Yes — Robert Isom's NPI (1356428072) is active in the NPPES registry as of the last update on 2022-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.