NPPES file of Aug 9, 2026

Mary Eileen Berg, NP

Obstetrics & Gynecology Nurse Practitioner · Upland, CA

Mary Eileen Berg, NP is an obstetrics & gynecology nurse practitioner with a practice address in Upland, California, and NPI 1336352939, issued on May 8, 2007. Check the license (California 389253, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1336352939
Name
Mary Eileen Berg
Credential
NP
Primary taxonomy
Obstetrics & Gynecology Nurse Practitioner 363LX0001X
License number
389253 CA
Self-reported in NPPES; status is on the state search
Practice location
600 N Mountain Ave, Upland, CA 91786
Phone
(909) 931-1033
Enumerated
May 8, 2007
Record last updated
Nov 8, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(909) 981-8976
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology nurse practitioner records → All 394 in California → Look up another NPI →

Also registered at 600 N Mountain Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Karen Allgaier, FNPFamily Nurse Practitioner1629220629
  2. Angela Barrios-Lucero, LMFTMarriage & Family Therapist1740443621
  3. Paul Chang, DDSDentist1760698914
  4. Lisa Chong, MDObstetrics & Gynecology Physician1467539304
  5. Kay Crawford, NPFamily Nurse Practitioner1205115425
  6. Patricia Fromer, M.S.Marriage & Family Therapist1083747158

Verify Mary Eileen Berg in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 389253    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $24.67

1 payment: food and beverage; the largest payer was Abbott Laboratories. The 1,033 providers of this specialty with any payment received $439.39 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mary Berg$24.67
  2. Specialty average$439.39

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Mary Eileen Berg among 394 obstetrics & gynecology nurse practitioner records in California

Mary Eileen Berg, NP is one of 394 obstetrics & gynecology nurse practitioner records with a practice address in California. 38% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 38% of them.

  • NPI issued2007 · 38% of these records are older, 39% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileNo · 14% of these records are
  • Record last updated2010 · 72% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LX0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Nurse Practitioner providers in California

There are 394 obstetrics & gynecology nurse practitioner records in California.

All 394 in California → Every provider in Upland → Obstetrics & Gynecology Nurse Practitioner nationwide →

The 8 obstetrics & gynecology nurse practitioner records with the nearest ZIP codes

  1. Lorraine Dominick, WHNPUpland, CA 917861205265931
  2. Harlene Castillo, WHNP-BCRosemead, CA 917701629720834
  3. Susan Aquino, NPPomona, CA 917681427235027
  4. Blanca Garia, RN NPPomona, CA 917681710233531
  5. Ruth Mendez, N.P.Pomona, CA 917681811052418
  6. Sherri Purpora, N.P.Pomona, CA 917681871620724
  7. Ellen Silver, NPPomona, CA 917671255739058
  8. Mauva Beharie, N.P.El Monte, CA 917311972860914

Common questions

What is Mary Eileen Berg, NP's NPI number?

Mary Eileen Berg, NP's National Provider Identifier (NPI) is 1336352939, issued on May 8, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mary Eileen Berg, NP located?

The NPPES record lists a practice address at 600 N Mountain Ave, Upland, CA, 91786. Phone: (909) 931-1033. Providers update this record themselves, so call before visiting.

How can I verify Mary Eileen Berg, NP's license?

NPPES lists California license number 389253, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.