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PROHEALTH PARTNERS A MEDICAL GROUP
NPI 1972637890
Internal Medicine - Nephrology in Los Alamitos, CA

Active since March 15, 2007
3851 KATELLA AVE STE 325, LOS ALAMITOS, CA 90720(562) 286-6466(562) 286-6465 Get Directions Write a Review

NPPES record last updated: February 13, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 13, 2018, Nov 25, 2015, Nov 19, 2015 (3 updates tracked since 2015).

About Prohealth Partners A Medical Group NPPES

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

PROHEALTH PARTNERS A MEDICAL GROUP (NPI 1972637890) is a healthcare organization registered as a nephrology in Los Alamitos, California and active in the NPI registry since March 2007. The organization lists Barry S Allswang, President, as its authorized official.

NPPES Registry Identity

NPI1972637890
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NamePROHEALTH PARTNERS A MEDICAL GROUP
Location Address3851 KATELLA AVE STE 325Los Alamitos, CA 90720-3574
Mailing Address3851 Katella Ave Ste 325Los Alamitos, CA 90720-3574 · (562) 286-6466 · Fax (562) 286-6465
Phone(562) 286-6466
Fax(562) 286-6465
Organization SubpartNo
Authorized OfficialBarry S AllswangPresident · (562) 299-5200
Enumeration DateMarch 15, 2007
Last NPPES UpdateFebruary 13, 20183 updates tracked since enumeration
✔ NPI 1972637890 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
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.
3851 KATELLA AVE STE 325, 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 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, 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
Thien-Kim Co, DO
Nephrology
NPI 1033732953
3851 KATELLA AVE STE 325
Los Alamitos, CA 90720
(562) 286-6466
✔ 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
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
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 MedicareSame address
Michele Nelson-Chung, LMFT
Marriage and Family Therapist
NPI 1548704612
3801 KATELLA AVE STE 330
Los Alamitos, CA 90720
(562) 740-5303
✔ PECOS✔ Accepts MedicareSame address
Sheida Kashani, D.O.
Internal Medicine
NPI 1285752436
10941 BLOOMFIELD ST STE A
Los Alamitos, CA 90720
(562) 716-7466
✔ 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
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's NPI number?

The NPI number for Prohealth Partners A Medical Group is 1972637890. It was assigned to this organization in the NPPES registry on March 15, 2007.

Where is Prohealth Partners A Medical Group located?

Prohealth Partners A Medical Group is located at 3851 Katella Ave Ste 325, Los Alamitos, CA 90720. The listed phone number is (562) 286-6466.

What is Prohealth Partners A Medical Group's specialty?

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

Is Prohealth Partners A Medical Group enrolled in Medicare?

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

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

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. 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 was last updated on February 13, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.