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CHARMAINE K. SHEN MD
NPI 1922016880
Internal Medicine in Alameda, CA

Active since August 04, 2006PECOS Enrolled
2417 CENTRAL AVE, ALAMEDA, CA 94501(510) 752-1000 Get Directions Write a Review

NPPES record last updated: January 10, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Charmaine K. Shen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHARMAINE K. SHEN MD (NPI 1922016880) is an individual internal medicine provider in Alameda, California, licensed in California (A107295) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922016880
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameCHARMAINE K. SHENCredential: MD
Location Address2417 CENTRAL AVEAlameda, CA 94501-4515
Mailing Address115 Central AveAlameda, CA 94501-3244 · (415) 595-9712
Phone(510) 752-1000
Sole ProprietorNo
Enumeration DateAugust 4, 2006
Last NPPES UpdateJanuary 10, 2022
✔ NPI 1922016880 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A107295
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2417 CENTRAL AVE, Alameda, CA 94501
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Other Names 1

Other Name (5)Charmaine K. Leung-shea Md

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Charmaine K. Shen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Charmaine Shen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
11 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200
John Muir Physician Network
15 mi
General Practice
1450 TREAT BLVD, SUITE 300
Walnut Creek, CA 94597
  • Reassigned Medicare billing, California enrollment
  • 650 clinicians in this Medicare group
NPI 1841407665 (925) 296-9872

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CLARENCE SPARKS
Internal Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 752-1190
DAVID R. CRANEY MD
Internal Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 749-5731
CHARLIE C. CHU MD
Internal Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 749-5731
CHUONG M. DO MD
Internal Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 752-1000
DR. JOHN PAKULA MD
Family Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 752-1000
ANGELA LAI CHAN MD
Internal Medicine
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 749-5731
LEO YEE HUNG CHENG MD
Pediatrics
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 749-5731
LINH T. HOANG MD
Obstetrics & Gynecology
2417 CENTRAL AVE
ALAMEDA, CA 94501
Alameda County (510) 752-1000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Charmaine Shen's NPI number?

The NPI number for Charmaine Shen is 1922016880. It was assigned to this individual provider in the NPPES registry on August 4, 2006. The provider is also known as Charmaine K. Leung-Shea MD.

Where is Charmaine Shen located?

Charmaine Shen practices at 2417 Central Ave, Alameda, CA 94501. The listed phone number is (510) 752-1000.

What is Charmaine Shen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Charmaine Shen enrolled in Medicare?

Yes. Charmaine Shen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Charmaine Shen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charmaine Shen reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (San Francisco, CA) and John Muir Physician Network (Walnut Creek, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Charmaine Shen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Charmaine Shen was last updated on January 10, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.