DR. LLOYD W KLEIN MD
NPI 1063495166
Internal Medicine - Cardiovascular Disease in San Francisco, CA
About Dr. Lloyd W Klein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LLOYD W KLEIN MD (NPI 1063495166) is an individual cardiovascular disease provider in San Francisco, California, licensed in California (G149163) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Cincinnati College Of Medicine (1977).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
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. Lloyd W Klein 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.
Medicare Billing Reassignments
5Medicare enrollment records show Lloyd Klein reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Ukiah, CA 95482
- Reassigned Medicare billing, California enrollment
- 221 clinicians in this Medicare group
Elmhurst, IL 60126
- Reassigned Medicare billing, Illinois enrollment
- 205 clinicians in this Medicare group
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 2
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.
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.
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 Lloyd Klein's NPI number?
The NPI number for Lloyd Klein is 1063495166. It was assigned to this individual provider in the NPPES registry on November 22, 2005.
Where is Lloyd Klein located?
Lloyd Klein practices at 505 Parnassus Ave # M-1777a, San Francisco, CA 94143. The listed phone number is (415) 476-1325.
What is Lloyd Klein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Lloyd Klein enrolled in Medicare?
Yes. Lloyd Klein 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 Lloyd Klein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lloyd Klein reassigns Medicare benefits to 5 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Ukiah Adventist Hospital (Ukiah, CA) and Elmhurst Memorial Hospital (Elmhurst, IL). 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 Lloyd Klein'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 Lloyd Klein was last updated on October 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Lloyd W Klein, MD · NPI 1063495166
Cardiovascular Disease physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since November 22, 2005.
## Identity
- **NPI:** 1063495166 (Entity type: Individual)
- **Enumerated:** November 22, 2005
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** G149163 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE # M-1777A, San Francisco, CA 94143-2204
- **Phone:** (415) 476-1325 · **Fax:** (415) 476-9802
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1376613943, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Ukiah Adventist Hospital (NPI 1235120676, Ukiah, CA); Elmhurst Memorial Hospital (NPI 1548306343, Elmhurst, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Cincinnati College Of Medicine, class of 1977
## Record status
- **NPPES last updated:** October 14, 2021
- **Other identifiers:** Medicaid 036076526 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1063495166) · Data from the CMS NPPES public registry.