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DR. LEE-MAY CHEN MD
NPI 1902861883
Obstetrics & Gynecology - Gynecologic Oncology in San Francisco, CA

Active since April 20, 2006PECOS EnrolledAccepts Medicare Assignment
74.46/100
CMS Quality Rating
1600 DIVISADERO ST, SAN FRANCISCO, CA 94143(415) 353-9600(415) 353-7657 Get Directions Write a Review

NPPES record last updated: September 10, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Lee-may Chen Md NPPES

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

DR. LEE-MAY CHEN MD (NPI 1902861883) is an individual gynecologic oncology provider in San Francisco, California, licensed in California (G83192) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (1992).

NPPES Registry Identity

NPI1902861883
Entity TypeIndividualFemale
Primary Taxonomy207VX0201X
Provider Legal NameDR. LEE-MAY CHENCredential: MD
Location Address1600 DIVISADERO STSan Francisco, CA 94143-0001
Mailing Address1635 Divisadero St, Ste 625, Box 1821San Francisco, CA 94143-0001 · (415) 476-4029 · Fax (415) 476-4150
Phone(415) 353-9600
Fax(415) 353-7657
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 1992
Enumeration DateApril 20, 2006
Last NPPES UpdateSeptember 10, 2012
✔ NPI 1902861883 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Gynecologic OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207VX0201X
License✔ Licensed in CA · G83192
Definition
An obstetrician/gynecologist who provides consultation and comprehensive management of patients with gynecologic cancer, including those diagnostic and therapeutic procedures necessary for the total care of the patient with gynecologic cancer and resulting complications.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License G83192 (CA)
1600 DIVISADERO ST, San Francisco, CA 94143
Open in Google Maps ↗

Other Identifiers 3

Medicare UPING91049CA
Medicaid00G831920CA
Medicare PIN00G831920CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Lee-may Chen 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 ID3870677701
PECOS Enrollment IDI20080229000579
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

4

Medicare enrollment records show Lee-may Chen reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

City & County Of San Francisco
0.3 mi
Federally Qualified Health Center (FQHC)
1301 PIERCE STREET
San Francisco, CA 94115
  • Reassigned Medicare billing, California enrollment
  • 1,573 clinicians in this Medicare group
NPI 1932140795 (415) 292-1300
University Of California San Francisco
1.8 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
1.8 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808
University Of California Sfgh Medical Group
2.8 mi
Family Medicine
1001 POTRERO AVE, BLDG 80 WARD 83 RM 320
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • 842 clinicians in this Medicare group
NPI 1174598296 (628) 206-8610

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

Areas of Expertise CMS Part B claims 6

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 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.
104 services51 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
57 services16 patients
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.
52 services49 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
49 services26 patients
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.
24 services17 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
21 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.46/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability76
Improvement Activities40
Cost46.68

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.

MERLIN D LARSON MD
Anesthesiology
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 885-7412
DEVIN ARTHUR OLLER MD
Internal Medicine
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-7900
MELANIE I. ZUK-MOYA PTA
Physical Therapy Assistant
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (646) 770-6621
HWA SOO HOANG MD
Psychiatry & Neurology (Psychiatry)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000
MEGHAN JAIRAM MD
Radiology (Diagnostic Radiology)
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 885-7464
NAOMI JAY NP
Nurse Practitioner
1600 DIVISADERO ST, 4TH FLOOR
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-7443
MEGAN SWANSON M.D.
Obstetrics & Gynecology
1600 DIVISADERO ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 206-4069
NIKI LOVICK LCGC
Genetic Counselor, MS
1600 DIVISADERO ST, 4TH FLOOR BOX 1774
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-8778

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 Lee-may Chen's NPI number?

The NPI number for Lee-may Chen is 1902861883. It was assigned to this individual provider in the NPPES registry on April 20, 2006.

Where is Lee-may Chen located?

Lee-may Chen practices at 1600 Divisadero St, San Francisco, CA 94143. The listed phone number is (415) 353-9600.

What is Lee-may Chen's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.

Is Lee-may Chen enrolled in Medicare?

Yes. Lee-may Chen 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.

Which organizations bill Medicare for Lee-may Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lee-may Chen reassigns Medicare benefits to 4 organizations: City & County Of San Francisco (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, 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 Lee-may Chen'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 Lee-may Chen was last updated on September 10, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.