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DR. NATHANIEL STANLEY FUNG M.D.
NPI 1245686195
Surgery - Surgical Critical Care in Moreno Valley, CA

Active since May 10, 2016PECOS EnrolledAccepts Medicare Assignment
85.18/100
CMS Quality Rating
26520 CACTUS AVE, MORENO VALLEY, CA 92555(951) 486-5177 Get Directions Write a Review

NPPES record last updated: January 27, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 27, 2023, May 10, 2016 (2 updates tracked since 2016).

About Dr. Nathaniel Stanley Fung M.d. NPPES

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

DR. NATHANIEL STANLEY FUNG M.D. (NPI 1245686195) is an individual surgical critical care provider in Moreno Valley, California, licensed in California (A179922) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1245686195
Entity TypeIndividualMale
Primary Taxonomy2086S0102X
Provider Legal NameDR. NATHANIEL STANLEY FUNGCredential: M.D.
Location Address26520 CACTUS AVEMoreno Valley, CA 92555-3927
Mailing Address26520 Cactus AveMoreno Valley, CA 92555-3927
Phone(951) 486-5177
Sole ProprietorYes
Medical School CMSOtherGraduated 2016
Enumeration DateMay 10, 2016
Last NPPES UpdateJanuary 27, 20232 updates tracked since enumeration
NPPES CertifiedJanuary 27, 2023
✔ NPI 1245686195 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Surgical Critical CareAllopathic & Osteopathic Physicians
Taxonomy Code2086S0102X
License✔ Licensed in CA · A179922
Definition
A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
26520 CACTUS AVE, Moreno Valley, CA 92555
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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. Nathaniel Stanley Fung 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 ID840676169
PECOS Enrollment IDI20221010002219
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.

Medicare Billing Reassignment

Medicare enrollment records show Nathaniel Fung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Faculty Physicians And Surgeons Of Llusm
Same address
Clinical Pathology
26520 CACTUS AVE
Moreno Valley, CA 92555
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1275191926 (909) 558-4000

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 8

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.
60 services39 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
47 services24 patients
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.
39 services36 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.
29 services28 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.
28 services21 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
18 services18 patients

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.

85.18/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality71.81
Promoting Interoperability82
Improvement Activities40
Cost64.54

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.

MARINA BOYARSKY M.D.
Student in an Organized Health Care Education/Training Program
26520 CACTUS AVE, FAMILY MEDICINE RESIDENCY PROGRAM
MORENO VALLEY, CA 92555
Riverside County (951) 486-5611
DR. THU KIEU NGUYEN HUYNH PHARM.D.
Pharmacist
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-4613
ASHA PATEL RAJ DO
Family Medicine
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (714) 904-8341
COUNTY OF RIVERSIDE
Clinic/Center (Primary Care)
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-4000
MERETT W SAAD DO
Student in an Organized Health Care Education/Training Program
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-4000
GRACE SHINN
Pharmacist (Emergency Medicine)
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-4000
NOLAN S LANGFORD
Student in an Organized Health Care Education/Training Program
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-5434
DR. MY NGUYEN D.O.
Pediatrics
26520 CACTUS AVE
MORENO VALLEY, CA 92555
Riverside County (951) 486-4000

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 Nathaniel Fung's NPI number?

The NPI number for Nathaniel Fung is 1245686195. It was assigned to this individual provider in the NPPES registry on May 10, 2016.

Where is Nathaniel Fung located?

Nathaniel Fung practices at 26520 Cactus Ave, Moreno Valley, CA 92555. The listed phone number is (951) 486-5177.

What is Nathaniel Fung's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Critical Care, with taxonomy code 2086S0102X.

Is Nathaniel Fung enrolled in Medicare?

Yes. Nathaniel Fung 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 organization bills Medicare for Nathaniel Fung's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Fung reassigns Medicare benefits to Faculty Physicians And Surgeons Of Llusm (Moreno Valley, CA). The 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 Nathaniel Fung'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 Nathaniel Fung was last updated on January 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.