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MR. MICHAEL HYUNJEAN LEE MD
NPI 1841637162
Internal Medicine - Pulmonary Disease in San Francisco, CA

Active since May 28, 2013PECOS EnrolledAccepts Medicare Assignment
91.85/100
CMS Quality Rating
1001 POTRERO AVE # 5H22, SAN FRANCISCO, CA 94110(628) 206-8000 Get Directions Write a Review

NPPES record last updated: April 6, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 6, 2026, Feb 1, 2022, Dec 3, 2021 and 8 more (11 updates tracked since 2016).

About Mr. Michael Hyunjean Lee Md NPPES

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

MR. MICHAEL HYUNJEAN LEE MD (NPI 1841637162) is an individual pulmonary disease provider in San Francisco, California, licensed in California (A168234) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of New York University School Of Medicine (2013).

NPPES Registry Identity

NPI1841637162
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameMR. MICHAEL HYUNJEAN LEECredential: MD
Location Address1001 POTRERO AVE # 5H22San Francisco, CA 94110-3518
Mailing AddressPo Box 743749Los Angeles, CA 90074-3749 · (415) 514-3000 · Fax (415) 502-8175
Phone(628) 206-8000
Sole ProprietorNo
Medical School CMSNew York University School Of MedicineGraduated 2013
Enumeration DateMay 28, 2013
Last NPPES UpdateApril 6, 202611 updates tracked since enumeration
NPPES CertifiedApril 6, 2026
✔ NPI 1841637162 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
Licenses✔ Licensed in CA · A168234✔ Licensed in CO · DR.0058755
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 277698 (NY), A168234 (CA)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 01084425A (IN), 57855 (CO)
1001 POTRERO AVE # 5H22, San Francisco, CA 94110
Open in Google Maps ↗

Secondary Practice Locations 2

Location 15200 Dtc Pkwy Ste 400Greenwood Village, CO 80111-2719 · Phone (303) 745-0000
Location 213001 E 17th PlAurora, CO 80045-2570 · Phone (720) 848-0000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Oscar Insurance Company.Insurance ›

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

Mr. Michael Hyunjean Lee 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 ID2668758269
PECOS Enrollment IDI20200715000898
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

7

Medicare enrollment records show Michael Lee reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

City & County Of San Francisco
Same address
General Acute Care Hospital
1001 POTRERO AVE, BUILDING 5, WARD 1B
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • 1,573 clinicians in this Medicare group
NPI 1083648810 (415) 759-4067
University Of California Sfgh Medical Group
Same address
Family Medicine
1001 POTRERO AVE, BLDG 80 WARD 83 RM 320
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1073836060 (California)
  • 842 clinicians in this Medicare group
NPI 1174598296 (628) 206-8610
Permanente Medical Group Inc
2.7 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
Regents Of The University Of California
2.8 mi
Endocrinology, Diabetes & Metabolism
1600 DIVISADERO ST
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 2,112 clinicians in this Medicare group
NPI 1235322348 (415) 353-9720
Chinese Hospital Association
2.8 mi
General Acute Care Hospital
845 JACKSON ST
San Francisco, CA 94133
  • Reassigned Medicare billing, California enrollment
  • 51 clinicians in this Medicare group
NPI 1992898837 (415) 982-2400
University Of California San Francisco
3.0 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
3.0 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

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
65 services28 patients
Test to examine how well the lungs exchange gases 94729
This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.
42 services42 patients
Test to measure expiratory airflow and volume 94010
This test, known as spirometry, assesses how well your lungs work. It measures how much air you can inhale, how much you can exhale and how quickly you can exhale. It's non-invasive and helps diagnose conditions like asthma or COPD.
35 services35 patients
Test to determine lung volumes using sensors 94726
This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.
30 services30 patients
Test to measure expiratory airflow and volume changes before and after medication administration 94060
This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.
14 services14 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
14 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94110 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.

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.

91.85/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality83.53
Promoting Interoperability100
Improvement Activities40
Cost68.01

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 Michael Lee's NPI number?

The NPI number for Michael Lee is 1841637162. It was assigned to this individual provider in the NPPES registry on May 28, 2013.

Where is Michael Lee located?

Michael Lee practices at 1001 Potrero Ave # 5h22, San Francisco, CA 94110. The listed phone number is (628) 206-8000.

What is Michael Lee's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Michael Lee enrolled in Medicare?

Yes. Michael Lee 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 Michael Lee's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Lee reassigns Medicare benefits to 7 organizations: City & County Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), Permanente Medical Group Inc (San Francisco, CA), Regents Of The University Of California (San Francisco, CA), Chinese Hospital Association (San Francisco, CA) and 2 more organizations, listed in the Medicare section above. 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 Michael Lee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Lee accept?

Health plans from Oscar Health and Oscar Insurance Company list Michael Lee 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.

When was this NPI record last updated?

The NPPES record for Michael Lee was last updated on April 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.