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PROHEALTH PARTNERS A MEDICAL GROUP INC
NPI 1841622016
Internal Medicine in Los Alamitos, CA

Active since July 30, 2013
3851 KATELLA AVE STE 205, LOS ALAMITOS, CA 90720(562) 794-2776 Get Directions Write a Review

NPPES record last updated: September 17, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 17, 2025, Jan 2, 2024, Sep 30, 2019 and 3 more (6 updates tracked since 2019).

About Prohealth Partners A Medical Group Inc NPPES

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

PROHEALTH PARTNERS A MEDICAL GROUP INC (NPI 1841622016) is a healthcare organization registered as an internal medicine in Los Alamitos, California and active in the NPI registry since July 2013. The organization lists Peter Ferrera, President, as its authorized official.

NPPES Registry Identity

NPI1841622016
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NamePROHEALTH PARTNERS A MEDICAL GROUP INC
Location Address3851 KATELLA AVE STE 205Los Alamitos, CA 90720-3433
Mailing Address3851 Katella Ave Ste 205Los Alamitos, CA 90720-3433 · (714) 794-2776
Phone(562) 794-2776
Organization SubpartNo
Authorized OfficialPeter FerreraPresident · (562) 299-5200
Enumeration DateJuly 30, 2013
Last NPPES UpdateSeptember 17, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2025
✔ NPI 1841622016 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3851 KATELLA AVE STE 205, Los Alamitos, CA 90720
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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Prohealth Partners A Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

278

Medicare enrollment records show 278 clinicians reassign Medicare billing to Prohealth Partners A Medical Group Inc, which bills Medicare for the services they deliver. Of these, 6 practice at this address and 141 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 38

Nurse Practitioner55
Internal Medicine50
Family Practice38
Nephrology18
Cardiovascular Disease (Cardiology)17
Obstetrics/Gynecology10
Gastroenterology7
Hospitalist6
30 other specialties77

Nearest to this location (20)

See all 278
Ruby Elaine Calalo, AGACNP-BC
Nurse Practitioner
NPI 1043915440
3851 KATELLA AVE STE 315
Los Alamitos, CA 90720
(562) 626-8016
✔ PECOS✔ Accepts MedicareSame address
Mary Seiersen, RDE
Registered Dietitian or Nutrition Professional
NPI 1538282983
3851 KATELLA AVE STE 275
Los Alamitos, CA 90720
(562) 296-5528
Same address
Veronica Zoleta, NP
Nurse Practitioner
NPI 1992446868
3851 KATELLA AVE STE 275
Los Alamitos, CA 90720
(562) 296-5528
✔ PECOSSame address
Thien-Kim Co, DO
Nephrology
NPI 1033732953
3851 KATELLA AVE STE 325
Los Alamitos, CA 90720
(562) 286-6466
✔ PECOS✔ Accepts MedicareSame address
Petra Wong, MD
Internal Medicine
NPI 1578585915
3801 KATELLA AVE STE 300
Los Alamitos, CA 90720
(562) 430-6472
✔ PECOS✔ Accepts MedicareSame address
Ana Maria De Jesus
Nurse Practitioner
NPI 1801497706
3801 KATELLA AVE STE 3303801
Los Alamitos, CA 90720
(949) 610-4919
✔ PECOS✔ Accepts MedicareSame address
Sandra Kim, FNP, RN, PHN
Nurse Practitioner
NPI 1306355698
3801 KATELLA AVE STE 330
Los Alamitos, CA 90720
(562) 594-9546
✔ PECOS✔ Accepts Medicare0.1 mi
Michele Nelson-Chung, LMFT
Marriage and Family Therapist
NPI 1548704612
3801 KATELLA AVE STE 330
Los Alamitos, CA 90720
(562) 740-5303
✔ PECOS✔ Accepts Medicare0.1 mi
Winston Chung, MD
Internal Medicine
NPI 1851322085
3801 KATELLA AVE SUITE 330
Los Alamitos, CA 90720
(562) 594-9546
✔ PECOS✔ Accepts Medicare0.1 mi
Gerald Cohen, MD
Internal Medicine
NPI 1306877253
3801 KATELLA AVE SUITE 330
Los Alamitos, CA 90720
(562) 594-9546
✔ PECOS✔ Accepts Medicare0.1 mi
Jennifer Kim Loomis, D.O.
Family Practice
NPI 1215136940
3801 KATELLA AVE 222
Los Alamitos, CA 90720
(562) 296-5528
✔ PECOS✔ Accepts Medicare0.1 mi
Duke Ahn, M.D.
Orthopedic Surgery
NPI 1942318373
3700 KATELLA AVE STE C
Los Alamitos, CA 90720
(562) 583-2250
✔ PECOS✔ Accepts Medicare0.2 mi
James Sheppard, DO
Family Practice
NPI 1255686044
3700 KATELLA AVE STE D
Los Alamitos, CA 90720
(562) 855-2700
✔ PECOS✔ Accepts Medicare0.2 mi
Rebekah Neal, M.D.
Rheumatology
NPI 1215165667
10861 CHERRY ST SUITE 104
Los Alamitos, CA 90720
(562) 794-9801
✔ PECOS✔ Accepts Medicare0.2 mi
Rebecca Schwartz, MD
Obstetrics/Gynecology
NPI 1619931599
10861 CHERRY ST STE 105
Los Alamitos, CA 90720
(562) 595-1961
✔ PECOS✔ Accepts Medicare0.2 mi
Danielle Villatoro, NP
Nurse Practitioner
NPI 1023560885
10861 CHERRY ST STE 105
Los Alamitos, CA 90720
(562) 595-1961
✔ PECOS✔ Accepts Medicare0.2 mi
Meenakshi Verma, M.D
Nephrology
NPI 1942463427
10861 CHERRY ST STE 104
Los Alamitos, CA 90720
(562) 446-0580
✔ PECOS✔ Accepts Medicare0.2 mi
Karen Koe, MD
Obstetrics/Gynecology
NPI 1780648709
10861 CHERRY ST STE 308
Los Alamitos, CA 90720
(562) 595-1961
✔ PECOS✔ Accepts Medicare0.2 mi
Andrew Hanna, D.O.
Physical Medicine and Rehabilitation
NPI 1972042620
3662 KATELLA AVE STE 117
Los Alamitos, CA 90720
(310) 507-7984
✔ PECOS✔ Accepts Medicare0.3 mi
Daniel Kim
Hospitalist
NPI 1174801344
10541 CALLE LEE STE 117
Los Alamitos, CA 90720
(714) 794-2777
✔ PECOS✔ Accepts Medicare0.6 mi
See all 278 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Prohealth Partners A Medical Group Inc's NPI number?

The NPI number for Prohealth Partners A Medical Group Inc is 1841622016. It was assigned to this organization in the NPPES registry on July 30, 2013.

Where is Prohealth Partners A Medical Group Inc located?

Prohealth Partners A Medical Group Inc is located at 3851 Katella Ave Ste 205, Los Alamitos, CA 90720. The listed phone number is (562) 794-2776.

What is Prohealth Partners A Medical Group Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Prohealth Partners A Medical Group Inc enrolled in Medicare?

Yes. Prohealth Partners A Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Prohealth Partners A Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 278 clinicians in 38 Medicare specialties reassign their Medicare billing to Prohealth Partners A Medical Group Inc. A 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 the clinician's services. The largest specialties are Nurse Practitioner (55), Internal Medicine (50) and Family Practice (38). Of these, 6 practice at this address and 141 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Prohealth Partners A Medical Group Inc was last updated on September 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.