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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MICHAEL NEINAST DO
NPI 1770105769
Internal Medicine - Nephrology in Orange, CA

Active since May 12, 2020PECOS Enrolled
101 THE CITY DR S, ORANGE, CA 92868(714) 456-8888 Get Directions Write a Review

NPPES record last updated: July 22, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 22, 2026, May 22, 2023, May 1, 2023 and 1 more (4 updates tracked since 2020).

About Dr. Michael Neinast Do NPPES

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

DR. MICHAEL NEINAST DO (NPI 1770105769) is an individual nephrology provider in Orange, California, licensed in California (22603) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1770105769
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. MICHAEL NEINASTCredential: DO
Location Address101 THE CITY DR SOrange, CA 92868-3201
Mailing Address101 The City Dr SOrange, CA 92868-3201
Phone(714) 456-8888
Sole ProprietorNo
Enumeration DateMay 12, 2020
Last NPPES UpdateJuly 22, 20264 updates tracked since enumeration
NPPES CertifiedJuly 22, 2026
✔ NPI 1770105769 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · 22603
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License 125075898 (IL), 036.163604 (IL)
101 THE CITY DR S, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1701 N 1st StSpringfield, IL 62702-3757 · Phone (217) 545-8000
Location 2751 N Rutledge St Ste 1100Springfield, IL 62702-4968 · Phone (217) 545-8000
Location 31300 Franklin Ave Ste 380Normal, IL 61761-4266 · Phone (309) 268-3598 · Fax (309) 268-2536

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Michael Neinast Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 5

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 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.
71 services31 patients
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.
51 services33 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
39 services38 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
26 services26 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.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92868 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.

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.

DR. ANKIT BHUPENDRA PATEL D.O.
Radiology (Diagnostic Radiology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-5113
DR. LAURA CATHERINE SKOCZYLAS MD
Obstetrics & Gynecology
101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868
Orange County (714) 456-8224
MICHAEL CHENG DO
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7110
AESTHETIC AND PLASTIC SURGERY INSTITUTE
Plastic Surgery
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-2986
JOSEPH VILLARREAL M.D.
Emergency Medicine
101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868
Orange County (714) 456-5239
DEMI TRAN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868
Orange County (171) 456-6693
DR. ISABEL CARLTON CLARK M.D.
Surgery (Trauma Surgery)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7890
DYLAN LUKATO
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Orange County (415) 218-8041

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 Neinast's NPI number?

The NPI number for Michael Neinast is 1770105769. It was assigned to this individual provider in the NPPES registry on May 12, 2020.

Where is Michael Neinast located?

Michael Neinast practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-8888.

What is Michael Neinast's specialty?

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

Is Michael Neinast enrolled in Medicare?

Yes. Michael Neinast is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Michael Neinast was last updated on July 22, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.