Robert Ishak, M.D.
NPI 1295727790 · Internal Medicine Physician · Charleston, SC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Ishak, M.D. is a Internal Medicine Physician provider in Charleston, SC (NPI 1295727790).
Provider details
- NPI number
- 1295727790
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MF070336L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
1,700 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 | 698 | $120 |
| 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 | 361 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 109 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $61 |
| Hemoglobin A1c Level83036 | 71 | $10 |
| 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 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 467 | 156 |
| Rosuvastatin Calcium | 430 | 136 |
| Amlodipine Besylate | 304 | 95 |
| Losartan Potassium | 228 | 75 |
| Levothyroxine Sodium | 185 | 57 |
| Lisinopril | 154 | 49 |
| Semaglutide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-19
- Last updated
- 2021-04-19
- Certified
- 2021-04-19
Frequently asked questions
- What is Robert Ishak's NPI number?
- Robert Ishak's National Provider Identifier (NPI) is 1295727790, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Ishak's specialty?
- Robert Ishak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Ishak located?
- Robert Ishak's practice location on file with NPPES is 171 Ashley Ave, Charleston, SC 29425-4339.
- What is Robert Ishak's phone number?
- The practice phone number listed in the NPPES registry for Robert Ishak is (843) 792-1414.
- Does Robert Ishak accept Medicare?
- Robert Ishak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Ishak's NPI active?
- Yes — Robert Ishak's NPI (1295727790) is active in the NPPES registry as of the last update on 2021-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.