Quick answers
- Does Shiva K. Annamalai accept Medicare assignment?
- Yes. Medicare's clinician data says Shiva K. Annamalai accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Shiva K. Annamalai see?
- In 2024, CMS data shows 810 Original Medicare patients and 1,641 services for Shiva K. Annamalai. This counts Original Medicare only and measures volume, not quality.
- What is Shiva K. Annamalai's NPI number?
- 1972915544. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Shiva K. Annamalai, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 810 |
|---|---|
| Services billed to Medicare | 1,641 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)309 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)282 services
- 3d radiographic procedure (76376)117 services
- Heart muscle strain imaging (93356)81 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)77 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease57%
- Arthritis46%
- Heart failure46%
- Atrial fibrillation46%
Hospitals where Shiva K. Annamalai works
Medicare's Facility Affiliation Data lists Shiva K. Annamalai at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Maine General Medical CenterAugusta, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200039
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009
- MaineHealth Mid Coast HospitalBrunswick, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200021
- MaineHealth Stephens HospitalNorway, ME · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 201315
- The Memorial HospitalNorth Conway, NH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 301307
Practice locations
Addresses where Shiva K. Annamalai is enrolled with Medicare (CMS data updated October 2, 2026).
- 22 Bramhall StPortland, ME 04102
- 93 Campus AveLewiston, ME 04240 (207) 777‑8100
- 96 Campus DrScarborough, ME 04074 (207) 885‑9905
- 96 Campus Dr, Suite 100Scarborough, ME 04074 (207) 396‑7500
Group practices
Medicare enrollment lists Shiva K. Annamalai as a member of these groups (CMS data updated October 2, 2026).
- MaineHealth2,633 clinicians in the group
- St Marys Regional Medical Center198 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Maine →
Other cardiologists in Portland
Clinicians with the same Medicare primary specialty in Portland, ME — not a recommendation.
Other clinicians in MaineHealth
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972915544 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians