STANLEY ANDREW TAN MD
NPI 1396747721
Internal Medicine - Endocrinology, Diabetes & Metabolism in Castro Valley, CA

Active since August 15, 2005PECOS EnrolledAccepts Medicare Assignment
20642 JOHN DR, CASTRO VALLEY, CA 94546(510) 785-5000 Get Directions Write a Review

NPPES record last updated: October 8, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Oct 8, 2025, Sep 19, 2025, Oct 11, 2024 (3 updates tracked since 2024).

About Stanley Andrew Tan Md NPPES

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

STANLEY ANDREW TAN MD (NPI 1396747721) is an individual endocrinology, diabetes & metabolism provider in Castro Valley, California, licensed in Florida (ME94328) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Holmes Regional Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1396747721
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameSTANLEY ANDREW TANCredential: MD
Location Address20642 JOHN DRCastro Valley, CA 94546-5103
Mailing Address20642 John DrCastro Valley, CA 94546-5103 · (510) 785-5000
Sole ProprietorYes
Medical School CMSLoma Linda University School Of MedicineGraduated 1971
Enumeration DateAugust 15, 2005
Last NPPES UpdateOctober 8, 20253 updates tracked since enumeration
NPPES CertifiedOctober 8, 2025
NPI 1396747721 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Licenses Licensed in FL · ME94328 Licensed in CA · G23082 Licensed in NC · 2003-00713
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License G23082 (CA)
20642 JOHN DR, Castro Valley, CA 94546

Secondary Practice Locations 2

Location 17125 Murrell RdMelbourne, FL 32940-7999 · Phone (321) 215-4910 · Fax (321) 434-4361
Location 21005 W Circle StAvon Park, FL 33825-2928 · Phone (863) 453-5500 · Fax (863) 453-5566

Other Identifiers 3

OtherV7918FL · Hfmg
Medicaid89133MTNC
MedicaidPENDINGFL

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Stanley Andrew Tan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9032105614
PECOS Enrollment IDI20051028000449
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.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
72 services62 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
48 services39 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
23 services23 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
18 services15 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
12 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Holmes Regional Medical Center

Acute Care Hospitals · Melbourne, FL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100019
Location1350 S Hickory StMelbourne, FL 32901 · Brevard County
Emergency services Birthing friendly

Cape Canaveral Hospital

Acute Care Hospitals · Cocoa Beach, FL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100177
Location701 W Cocoa Beach CausewayCocoa Beach, FL 32932 · Brevard County
Emergency services Birthing friendly

Viera Hospital

Acute Care Hospitals · Melbourne, FL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100315
Location8745 N Wickham RdMelbourne, FL 32940 · Brevard County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94546 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.

Internal Medicine
20642 JOHN DR
CASTRO VALLEY, CA 94546
Internal Medicine
20642 JOHN DR
CASTRO VALLEY, CA 94546
Physician Assistant
20642 JOHN DR
CASTRO VALLEY, CA 94546
Physician Assistant
20642 JOHN DR
CASTRO VALLEY, CA 94546
Obstetrics & Gynecology
20642 JOHN DR
CASTRO VALLEY, CA 94546
Nurse Practitioner
20642 JOHN DR
CASTRO VALLEY, CA 94546
Internal Medicine
20642 JOHN DR
CASTRO VALLEY, CA 94546
Physician Assistant
20642 JOHN DR
CASTRO VALLEY, CA 94546

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 Stanley Tan's NPI number?

The NPI number for Stanley Tan is 1396747721. It was assigned to this individual provider in the NPPES registry on August 15, 2005.

Where is Stanley Tan located?

Stanley Tan practices at 20642 John Dr, Castro Valley, CA 94546. The listed phone number is (510) 785-5000.

What is Stanley Tan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Stanley Tan enrolled in Medicare?

Yes. Stanley Tan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Stanley Tan accept?

Health plans from Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) list Stanley Tan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Stanley Tan affiliated with any hospitals?

According to CMS data, Stanley Tan is affiliated with Holmes Regional Medical Center, Cape Canaveral Hospital and Viera Hospital.

When was this NPI record last updated?

The NPPES record for Stanley Tan was last updated on October 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.