Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. COLLIN UNDERWOOD MPAS, PA-C
NPI 1457035032
Physician Assistant in Newport Beach, CA

Q: What is Collin Underwood's NPI number?

The NPI number for Collin Underwood is 1457035032. It was assigned to this individual provider in the NPPES registry on June 14, 2023.

Q: What is Collin Underwood's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Q: When was this NPI record last updated?

The NPPES record for Collin Underwood was last updated on October 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 days 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.

Active since June 14, 2023PECOS Enrolled

510 SUPERIOR AVE STE 290, NEWPORT BEACH, CA 92663(949) 764-4500(949) 764-4499 Get Directions Write a Review

NPPES record last updated: October 25, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Mr. Collin Underwood Mpas, Pa-c NPPES

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

MR. COLLIN UNDERWOOD MPAS, PA-C (NPI 1457035032) is an individual physician assistant in Newport Beach, California and active in the NPI registry since June 2023. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fresno, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1457035032

Entity TypeIndividualMale

Primary Taxonomy363A00000X

Provider Legal NameMR. COLLIN UNDERWOODCredential: MPAS, PA-C

Location Address510 SUPERIOR AVE STE 290Newport Beach, CA 92663-3664

Mailing Address5036 Timberline DrClinton, IL 61727-9594 · (217) 871-7687

Phone(949) 764-4500

Fax(949) 764-4499

Sole ProprietorNo

Medical School CMSOtherGraduated 2023

Enumeration DateJune 14, 2023

Last NPPES UpdateOctober 25, 2026

NPPES CertifiedOctober 25, 2026

✔ NPI 1457035032 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

510 SUPERIOR AVE STE 290, Newport Beach, CA 92663

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Secondary Practice Location 1

Location 12823 Fresno StFresno, CA 93721-1324 · Phone (559) 459-5621 ext. 35621

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

Mr. Collin Underwood Mpas, Pa-c 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 ID345694634

PECOS Enrollment IDI20230920001215

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.

34 services30 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.

30 services27 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.

18 services18 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

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92663 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

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

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 9

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

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