---
title: Atlas Commons research objects — Medicare Advantage organization directory entry for HMSA Akamai Advantage Dual Care (contract H8481)
license: CC0-1.0
source: CMS Medicare Advantage Plan Directory
---

# Atlas Commons research objects — Medicare Advantage organization directory entry for HMSA Akamai Advantage Dual Care (contract H8481)

CMS Medicare Advantage Plan Directory entry for HMSA Akamai Advantage Dual Care (contract H8481): organization identity (type, plan type, parent, CMS region), enrollment, and directory contact — all verbatim CMS-published values (RECORDED). Epistemic status of each figure is labeled. This is an organizational directory — not plan benefits, premiums, or star ratings; use medicare.gov/plan-compare to compare actual plans. CC0.

## Claims

### HMSA Akamai Advantage Dual Care (contract H8481) is a CMS-contracted Local CCP offering Local PPO plans

**RECORDED.** The CMS Medicare Advantage Plan Directory records HMSA Akamai Advantage Dual Care (legal entity: HAWAII MEDICAL SERVICE ASSOCIATION (HMSA), contract number: H8481) as a Local CCP offering Local PPO plans. Contract effective date: 01/01/2026. Tax status: Not-for-Profit/Non-Profit. CMS region: San Francisco. Parent organization: Hawaii Medical Service Association. These are verbatim CMS directory values; accuracy depends on carrier submissions to CMS.

Source: CMS Medicare Advantage Plan Directory — https://www.cms.gov/medicare/health-drug-plans/medicare-advantage
Falsifier: Verify at the CMS MA Plan Directory (https://www.cms.gov/medicare/health-drug-plans/medicare-advantage) by looking up contract number H8481. Falsified if the CMS directory contradicts these values.

### HMSA Akamai Advantage Dual Care (contract H8481) has 4,109 reported CMS enrollment

**RECORDED.** The CMS Medicare Advantage Plan Directory reports enrollment of 4,109 for HMSA Akamai Advantage Dual Care (contract H8481). This is a verbatim CMS-published figure from the plan directory — it is the enrollment as submitted to CMS, not a count of current active members or a ranked figure.

Source: CMS Medicare Advantage Plan Directory — https://www.cms.gov/medicare/health-drug-plans/medicare-advantage
Falsifier: Verify at the CMS MA Plan Directory for contract H8481. Falsified if the CMS directory shows a different enrollment figure.

### CMS MA Plan Directory contact for HMSA Akamai Advantage Dual Care (contract H8481)

**RECORDED.** The CMS MA Plan Directory lists the following directory contact for HMSA Akamai Advantage Dual Care (contract H8481): name: Nathan Hishinuma; title: Manager, Medicare Program; phone: 1-808-952-7823; email: nathan_hishinuma@hmsa.com; address: P.O. Box 860, 7 CR, Honolulu, HI, 96808. Last updated per CMS: 12/15/2025. This is the contact as submitted by the organization to CMS — it is not a consumer help line; it is the CMS-directory administrative contact.

Source: CMS Medicare Advantage Plan Directory — https://www.cms.gov/medicare/health-drug-plans/medicare-advantage
Falsifier: Verify at the CMS MA Plan Directory for contract H8481. Falsified if the CMS directory shows different contact information.

### What this Medicare Advantage directory entry is — and is NOT — for HMSA Akamai Advantage Dual Care (the epistemic boundary)

**INTERPRETATION.** This page is a directory of the organization offering Medicare Advantage / PACE plans under CMS contract H8481. It lists who the organization is, its type, parent, CMS region, and enrollment — verbatim from the CMS MA Plan Directory. It is NOT a directory of individual plan benefits, premiums, deductibles, drug formularies, or star ratings. Enrollment is a CMS-reported count, not a quality signal. To compare actual Medicare Advantage plans available in your area — including premiums, coverage, and star ratings — use the official Medicare Plan Finder at medicare.gov/plan-compare. For free, unbiased help understanding your Medicare options, contact your State Health Insurance Assistance Program (SHIP) or call 1-800-MEDICARE (1-800-633-4227).

Source: Coverage Atlas framing (over the CMS MA Plan Directory facts above) — https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-advantage/h8481
Falsifier: occurred=FALSE (a framing, not an event) and adjudged=FALSE (the atlas's reading, not a CMS verdict) — the LOWEST-warrant claim here. The org identity, enrollment, and contact above are verbatim CMS records; this boundary note is interpretation.

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Every claim above carries a four-status warrant (RECORDED / MODELED / DERIVED / INTERPRETATION) and a named source you can re-fetch — this is a research object, not a flat fact. Structured: `https://coverage-atlas.ryanjhunter.workers.dev/coverage/medicare-advantage/h8481.jsonld`

## Data

### HMSA Akamai Advantage Dual Care (H8481) — CMS MA Plan Directory identity (all RECORDED)

All figures are verbatim from the CMS Medicare Advantage Plan Directory. RECORDED = a verbatim CMS-published directory value; accuracy depends on carrier submissions to CMS.

| indicator | value | warrant | source |
| --- | --- | --- | --- |
| Contract number | H8481 | RECORDED | CMS Medicare Advantage Plan Directory |
| Legal entity name | HAWAII MEDICAL SERVICE ASSOCIATION (HMSA) | RECORDED | CMS Medicare Advantage Plan Directory |
| Organization marketing name | HMSA Akamai Advantage Dual Care | RECORDED | CMS Medicare Advantage Plan Directory |
| Organization type | Local CCP | RECORDED | CMS Medicare Advantage Plan Directory |
| Plan type | Local PPO | RECORDED | CMS Medicare Advantage Plan Directory |
| Contract effective date | 01/01/2026 | RECORDED | CMS Medicare Advantage Plan Directory |
| Tax status | Not-for-Profit/Non-Profit | RECORDED | CMS Medicare Advantage Plan Directory |
| Parent organization | Hawaii Medical Service Association | RECORDED | CMS Medicare Advantage Plan Directory |
| CMS region | San Francisco | RECORDED | CMS Medicare Advantage Plan Directory |
| Enrollment (CMS-reported) | 4,109 | RECORDED | CMS Medicare Advantage Plan Directory |
| Legal entity address | 818 Keeaumoku Street, Honolulu, HI, 96814 | RECORDED | CMS Medicare Advantage Plan Directory |

### HMSA Akamai Advantage Dual Care (H8481) — CMS MA Plan Directory contact (all RECORDED)

Directory contact as submitted by the organization to CMS. This is the administrative CMS-directory contact, not necessarily a consumer help line.

| field | value | warrant | source |
| --- | --- | --- | --- |
| Contact name | Nathan Hishinuma | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact title | Manager, Medicare Program | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact phone | 1-808-952-7823 | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact fax | 1-808-952-7823 | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact email | nathan_hishinuma@hmsa.com | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact address | P.O. Box 860, 7 CR, Honolulu, HI, 96808 | RECORDED | CMS Medicare Advantage Plan Directory |
| Contact last updated | 12/15/2025 | RECORDED | CMS Medicare Advantage Plan Directory |