Provider profile

Nathaniel AltavasMSN, PMHNP-BC, FNP-C

Nurse Practitioner, Family

2 locationsNPI 1790167146
99 Almaden Blvd Ste 600, San Jose, CA 95113702-276-7655

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Medicare Advantage plans for Santa Clara County, CA and Clark County, NV.

Use the name or plan ID on your member card, or choose your insurance company.

Directory results See what each insurance company reports

Listed on 4 plans so far

Some of Aetna Medicare, Anthem Blue Cross, Alignment Health Plan, Astiva Health, Blue Shield of California, Champion Health Plan, HealthSpring, Humana, Imperial Health Plan of California, Inc., Kaiser Permanente, Santa Clara Family Health Plan, SCAN Health Plan, Select Health, UnitedHealthcare and Wellcare's 2027 plans in Santa Clara County, CA and Clark County, NV haven't been checked yet.

The 105 Medicare Advantage plans we show for Santa Clara County, CA and Clark County, NV in 2027

  • 4 list Nathaniel
  • 30 not listed
  • 71 not checked yet

Aetna Medicare

3 plans list Nathaniel.

3plans
  • Aetna Medicare Eagle (HMO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 2710 Gateway Oaks Dr, Ste 150N, Sacramento, CA, 95833

    This result applies to these offices. Other locations are not confirmed.

    HMONo drug coverage3 starsH0523-099-000Medicare.gov
    $0a month
  • Aetna Medicare Signature (HMO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 2710 Gateway Oaks Dr, Ste 150N, Sacramento, CA, 95833

    This result applies to these offices. Other locations are not confirmed.

    HMODrug coverage3 starsH0523-083-000Medicare.gov
    $102a month
  • Aetna Medicare Signature Extra (HMO)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 2710 Gateway Oaks Dr, Ste 150N, Sacramento, CA, 95833

    This result applies to these offices. Other locations are not confirmed.

    HMODrug coverage2.5 starsH4982-030-000Medicare.gov
    $104a month

11 more Aetna Medicare plans haven't been checked yet.

Anthem Blue Cross · Anthem Blue Cross and Blue Shield

1 plan lists Nathaniel.

1plan
  • Anthem Full Dual Advantage Aligned (HMO D-SNP)

    Source: Medicare.gov provider data.

    Listed offices for this plan:

    • 99 Almaden Blvd, San Jose, CA, 95113
    • 325 S 1st St, San Jose, CA, 95113
    • 5201 Great America Pkwy, Santa Clara, CA, 95054
    • 3753 Howard Hughes Pkwy, Las Vegas, NV, 89169
    • 2300 W Sahara Ave, Henderson, NV, 89014
    • 1489 W Warm Springs Rd, Henderson, NV, 89014

    This result applies to these offices. Other locations are not confirmed.

    HMOFor people with Medicare and MedicaidDrug coverage3 starsH4471-010-002Medicare.gov
    $0a month

7 more Anthem Blue Cross plans haven't been checked yet.

Alignment Health Plan

Not checked yet.

6 more Alignment Health Plan plans haven't been checked yet.

Astiva Health

Not listed on its 3 plans here. That isn't proof they're out of network.

Blue Shield of California

Not listed on its 1 plan here. That isn't proof they're out of network.

Champion Health Plan

Not checked yet.

HealthSpring

Not checked yet.

Humana

Not checked yet.

Imperial Health Plan of California, Inc.

Not listed on its 4 plans here. That isn't proof they're out of network.

Kaiser Permanente

Not listed on its 3 plans here. That isn't proof they're out of network.

Santa Clara Family Health Plan

Not listed on its 1 plan here. That isn't proof they're out of network.

SCAN Health Plan

Not checked yet.

4 more SCAN Health Plan plans haven't been checked yet.

Select Health

Not checked yet.

UnitedHealthcare

Not checked yet.

Wellcare

Not checked yet.

Premiums are each plan's own monthly premium, as filed with Medicare. You keep paying your Medicare Part B premium.

Can't find your plan?Tell us the plan you have, and a licensed Silverpath advisor will check whether Nathaniel takes it. Free.

Original Medicare status

Most Medicare Supplement (Medigap) policies have no provider network: they help pay Original Medicare's cost sharing where Medicare is accepted. Medicare SELECT policies can require network providers for full benefits. Ask the office whether they accept Medicare.

Medicare enrollment and assignment have not been verified here. Advantage directory results do not answer this question.

No opt-out record in this CMS file. CMS's file covers data through 2026-08-31. This does not establish Medicare enrollment, assignment, or whether the office accepts new Medicare patients.

CMS opt-out source · Data through 2026-08-31 · Reviewed Oct 22, 2026

Compare Supplement plans

2 practice locations

99 Almaden Blvd Ste 600
San Jose, CA 95113

NPI Registry

5955 Edmond St
Las Vegas, NV 89118

NPI Registry
NPI issued
2015
Registry record updated
Jan 30, 2025

Medicare's clinician details aren't available on this page yet.

Common questions

Which 2027 Medicare Advantage plans list Nathaniel Altavas?

In Santa Clara County, CA and Clark County, NV, 4 Medicare Advantage plans for 2027 list Nathaniel in provider data from Medicare.gov or the carrier, including Aetna Medicare Eagle (HMO), Aetna Medicare Signature (HMO) and Aetna Medicare Signature Extra (HMO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Networks can change during the year, so confirm with the office or the plan before you enroll.

Where does Nathaniel Altavas practice?

2 locations, including 99 Almaden Blvd Ste 600, San Jose, CA. All of them are listed on this page.

How do I confirm Nathaniel is in my plan's network?

Call the member services number on your plan card and give them the NPI 1790167146, or ask a Silverpath advisor to check for you. It's free.

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Talk to a licensed advisor

A Silverpath advisor can confirm Nathaniel's networks with the carrier and help you compare plans that include them.

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For providers

Is this your practice?

Patients can use Silverpath to find practices and check plan networks in Santa Clara County, CA and Clark County, NV. Tell us which plans you take, or want to take, and we'll keep this page accurate and talk with you about reaching more Medicare patients and carriers.

Sources. Name, specialty and locations: the CMS NPI Registry (record updated 2025-01-30). Plan networks: carrier provider directories and Medicare.gov provider data, checked Oct 13, 2026. CMS matches apply to the covered offices shown with each plan. Plans: CMS 2027 Medicare Advantage landscape.

Networks change during the year, and a directory can be out of date. Confirm with the provider's office and the plan before you enroll or schedule care.

Silverpath is a licensed insurance agency. This page isn't affiliated with or endorsed by Nathaniel Altavas or their practice. Not connected with or endorsed by the U.S. government or the federal Medicare program.

We do not offer every plan available in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.

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