Individual provider Active NPI

Charlie Poisson Lin, MD

  • Internal Medicine Physician
  • Castro Valley, CA
National Provider Identifier
1326542259
Registry record updated Sep 28, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
A173959 Issued in CA
Practice address
20126 Stanton Ave Ste 100
Castro Valley, CA 94546-5270
Phone
(510) 537-3556
NPI assigned
Mar 23, 2018
Last updated
Sep 28, 2026By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 28, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X A173959 CA Primary
Clinical Cardiac Electrophysiology Physician 207RC0001X A173959 CA
Cardiovascular Disease Physician 207RC0000X A173959 CA

Addresses

Primary practice location

20126 Stanton Ave Ste 100
Castro Valley, CA 94546-5270

Mailing address

20126 Stanton Ave Ste 100
Castro Valley, CA 94546-5270
Phone (510) 537-3556

Other practice location 1

1510 San Pablo St Ste 300
Los Angeles, CA 90033-5320
Phone (800) 872-2273

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in OH
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20180626002153 OH Order and Referring Only - Internal MedicinePractitioner - Internal Medicine 7911252366

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
A173959CAMDClinical Cardiac Electrophysiology Physician

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1521763200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790553600000",
    "number": "1326542259",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "20126 STANTON AVE STE 100",
            "city": "CASTRO VALLEY",
            "state": "CA",
            "postal_code": "945465270",
            "telephone_number": "510-537-3556"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20126 STANTON AVE STE 100",
            "city": "CASTRO VALLEY",
            "state": "CA",
            "postal_code": "945465270",
            "telephone_number": "510-537-3556"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1510 San Pablo St Ste 300",
            "address_purpose": "LOCATION",
            "city": "Los Angeles",
            "state": "CA",
            "postal_code": "900335320",
            "country_code": "US",
            "telephone_number": "800-872-2273",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LIN",
        "first_name": "CHARLIE",
        "middle_name": "POISSON",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-03-23",
        "last_updated": "2026-09-28",
        "certification_date": "2026-09-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A173959",
            "primary": true
        },
        {
            "code": "207RC0001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Clinical Cardiac Electrophysiology",
            "state": "CA",
            "license": "A173959",
            "primary": false
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "CA",
            "license": "A173959",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Castro Valley, CA

Sources for this page

Verify at the official NPI Registry.