Sabarish Ayyappan, MD
NPI 1558551507 · Hematology (Internal Medicine) Physician · Iowa City, IA
Enrolled with Medicare as Practitioner - Hematology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sabarish Ayyappan, MD is a Hematology (Internal Medicine) Physician provider in Iowa City, IA (NPI 1558551507).
Provider details
- NPI number
- 1558551507
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD-46041 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
- Hospitalist Physician208M00000X
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
424 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 260 | $91 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 96 | $136 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $62 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 19 | $171 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 16 | $126 |
Typical Medicare-allowed amounts for these services range $62–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 97 | 35 |
| Lenalidomide | 74 | 15 |
| Acalabrutinib Maleatebrand: Calquence | 47 | — |
| Zanubrutinibbrand: Brukinsa | 33 | — |
| Allopurinol | 32 | 19 |
| Prednisone | 30 | 16 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 29 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48,237 across 62 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
Additional practice locations (3)
- 11100 Euclid AvenueCleveland, OH 44106Phone: (216) 844-8500
- 460 W 10th Ave Fl 5Columbus, OH 43210-1240Phone: (614) 293-3196Fax: (614) 293-4812
- 460 W 10th Ave Fl 5Columbus, OH 43210-1240Phone: (614) 293-3196Fax: (614) 293-4812
Registry dates
- Enumerated
- 2007-07-26
- Last updated
- 2019-07-15
Frequently asked questions
- What is Sabarish Ayyappan's NPI number?
- Sabarish Ayyappan's National Provider Identifier (NPI) is 1558551507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sabarish Ayyappan's specialty?
- Sabarish Ayyappan is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Sabarish Ayyappan located?
- Sabarish Ayyappan's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242.
- What is Sabarish Ayyappan's phone number?
- The practice phone number listed in the NPPES registry for Sabarish Ayyappan is (319) 356-7407.
- Does Sabarish Ayyappan accept Medicare?
- Sabarish Ayyappan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sabarish Ayyappan's NPI active?
- Yes — Sabarish Ayyappan's NPI (1558551507) is active in the NPPES registry as of the last update on 2019-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.