2026 NPPES data Nephrology Physician NPI 1629157375 MD
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WAI-KIN LEE, MD

Nephrology Physician in SOUTH SAN FRANCISCO, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
948
Medicare Part D claims · 140 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

WAI-KIN LEE, MD filed 948 Medicare Part D claims in 2023 as a Nephrology Physician in SOUTH SAN FRANCISCO, California, prescribing 87% generic.

948
Part D claims, 2023
87%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

WAI-KIN LEE, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

948 Top 25% higher than 75% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). This entry sits in this band. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

WAI-KIN LEE, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about WAI-KIN LEE, MD?

Quality data not reported

NPI registry status

Active

Issued 11/03/2006

NPI 1629157375

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

948 35% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in California

How Nephrology Physician compares to other specialties among California providers

California providers

Nephrology Physician share within California

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Nephrology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nephrology Physician ABMS/AOA estimate

Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

WAI-KIN LEE, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 1200 EL CAMINO REAL, SOUTH SAN FRANCISCO, CA, 94080, with a listed phone of (650) 742-2000. NPI 1629157375 was issued on 11/03/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEE most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 948 prescription claims written by this provider, covering 140 Medicare beneficiaries and totaling roughly $117K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 3.3%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1200 EL CAMINO REAL
SOUTH SAN FRANCISCO, CA 94080

Provider Details

NPI 1629157375
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 11/03/2006

Hospital and facility affiliations

Facilities where WAI-KIN LEE, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

PERMANENTE MEDICAL GROUP INC
REDWOOD CITY, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to WAI-KIN LEE, MD. To verify WAI-KIN LEE, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

WAI-KIN LEE, MD — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 948 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

948
Total Claims
$117K
Total Drug Cost
140
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,467
Total Day Supply
72,107
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$78K
Generic Drug Cost
$39K
Opioid Claims
31 (3.3% rate)

Patient Demographics

Average Patient Age
75.2 years
Avg HCC Risk Score
5.51
Gender Split
44% female / 56% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What WAI-KIN LEE, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Furosemide
78
Sevelamer Carbonate
55
Calcium Acetate
47
Metoprolol Tartrate
45
Losartan Potassium
44
Atorvastatin Calcium
42
Amlodipine Besylate
36
Terazosin Hcl
31
Hydralazine Hcl
29
Pantoprazole Sodium
29

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How WAI-KIN LEE, MD fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

WAI-KIN LEE, MD's 948 claims are below the specialty average of 1,454.

Nearby Nephrology Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as LEE.

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WAI-KIN LEE, MD's specialty?
WAI-KIN LEE, MD specializes in Nephrology Physician and practices in SOUTH SAN FRANCISCO, California. Credentials: MD.
How much does WAI-KIN LEE, MD prescribe under Medicare Part D?
In 2023, WAI-KIN LEE, MD wrote 948 Medicare Part D claims totaling $117K in drug costs for 140 beneficiaries.
Where is WAI-KIN LEE, MD located?
WAI-KIN LEE, MD is located at 1200 EL CAMINO REAL, SOUTH SAN FRANCISCO, CA, 94080. Phone: (650) 742-2000.
What is WAI-KIN LEE, MD's NPI number?
WAI-KIN LEE, MD's National Provider Identifier (NPI) is 1629157375, issued on 11/03/2006.
Does WAI-KIN LEE, MD prescribe more brand-name or generic drugs?
WAI-KIN LEE, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $78K in brand drug costs.
Does WAI-KIN LEE, MD prescribe opioids?
Yes, WAI-KIN LEE, MD had 31 opioid claims in 2023 with an opioid prescribing rate of 3.3%.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does WAI-KIN LEE, MD prescribe most often?
Based on 2023 Medicare Part D data, WAI-KIN LEE, MD's most frequently prescribed drugs include Furosemide, Sevelamer Carbonate, Calcium Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WAI-KIN LEE, MD accept Medicare?
WAI-KIN LEE, MD appears in CMS Medicare data with 948 Part D claims and 140 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WAI-KIN LEE, MD's credentials?
WAI-KIN LEE, MD's NPI is 1629157375 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology