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DR. MICHAEL S. LINSEY M.D.
NPI 1841215217
Internal Medicine - Nephrology in Pasadena, CA

Active since July 13, 2006PECOS EnrolledAccepts Medicare Assignment
50 ALESSANDRO PL STE 250, PASADENA, CA 91105(626) 577-1675(626) 577-9115 Get Directions Write a Review

NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Michael S. Linsey M.d. NPPES

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

DR. MICHAEL S. LINSEY M.D. (NPI 1841215217) is an individual nephrology provider in Pasadena, California, licensed in California (05D0681297) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (1977).

NPPES Registry Identity

NPI1841215217
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. MICHAEL S. LINSEYCredential: M.D.
Location Address50 ALESSANDRO PL STE 250Pasadena, CA 91105-3149
Mailing Address50 Alessandro Pl Ste 250Pasadena, CA 91105-3149 · (626) 577-1675 · Fax (626) 577-9115
Phone(626) 577-1675
Fax(626) 577-9115
Sole ProprietorNo
Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 1977
Enumeration DateJuly 13, 2006
Last NPPES UpdateFebruary 26, 2026
NPPES CertifiedFebruary 26, 2026
✔ NPI 1841215217 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · 05D0681297
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
50 ALESSANDRO PL STE 250, Pasadena, CA 91105
Open in Google Maps ↗

Other Identifiers 1

MedicaidG37688CA

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

Dr. Michael S. Linsey M.d. 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 ID9133219181
PECOS Enrollment IDI20100817001369
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 9

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
295 services67 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.
174 services71 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
115 services18 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
96 services39 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.
88 services50 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
55 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

Reported Quality Measures

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
100%98 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers60 claims4,875 services$0.31 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers33 claims5,160 services$0.20 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
4 suppliers53 claims53 services$18.59 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
5 suppliers42 claims55 services$12.18 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. KA-LOK E. TSE M.D.
Internal Medicine (Nephrology)
50 ALESSANDRO PL STE 250
PASADENA, CA 91105
Los Angeles County (626) 577-1675
MATTHEW KIM DO
Internal Medicine (Nephrology)
50 ALESSANDRO PL STE 250
PASADENA, CA 91105
Los Angeles County (626) 577-1675
DR. ANN MOORE MD
Internal Medicine (Nephrology)
50 ALESSANDRO PL STE 250
PASADENA, CA 91105
Los Angeles County (626) 577-1675
PASADENA NEPHROLOGY CORPORATION A MEDICAL GROUP
Internal Medicine (Nephrology)
50 ALESSANDRO PL STE 250
PASADENA, CA 91105
Los Angeles County (626) 577-1675

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 Linsey's NPI number?

The NPI number for Michael Linsey is 1841215217. It was assigned to this individual provider in the NPPES registry on July 13, 2006.

Where is Michael Linsey located?

Michael Linsey practices at 50 Alessandro Pl Ste 250, Pasadena, CA 91105. The listed phone number is (626) 577-1675.

What is Michael Linsey's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Michael Linsey enrolled in Medicare?

Yes. Michael Linsey 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.

When was this NPI record last updated?

The NPPES record for Michael Linsey was last updated on February 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.