NPPES file of Aug 9, 2026

Mary Ann De Guzman, LCSW

Counselor · Phoenix, AZ

Mary Ann De Guzman, LCSW is a counselor with a practice address in Phoenix, Arizona, and NPI 1669011748, issued on Jan 6, 2020. Check the license (Arizona 17508, as entered in NPPES) with the Arizona board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1669011748
Name
Mary Ann De Guzman
Credential
LCSW
Primary taxonomy
Counselor 101Y00000X
License number
17508 AZ
Self-reported in NPPES; status is on the state search
Practice location
650 E Indian School RD, Phoenix, AZ 85012
Phone
(602) 277-5551
Enumerated
Jan 6, 2020
Record last updated
Jan 6, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20260212004430); may accept Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest counselor records → All 1,161 in Arizona → Look up another NPI →

Also registered at 650 E Indian School RD

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

  1. Mehr Ahmed, MDPhysical Medicine & Rehabilitation Physician1245289883
  2. Matthew Ahuett, PHARM.D.Pharmacist1285741793
  3. Tywan AjaniClinical Social Worker1568151405
  4. Catherine Akbari, NPAdult Health Nurse Practitioner1013931633
  5. Anthony Albert, PHARMDAmbulatory Care Pharmacist1619320140
  6. Jesse Albin, BSN, RNMedical-Surgical Registered Nurse1144096801

Verify Mary Ann De Guzman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Arizona board licenses this profession
    Search for license 17508    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 Arizona 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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Mary Ann De Guzman among 1,161 counselor records in Arizona

Mary Ann De Guzman, LCSW is one of 1,161 counselor records with a practice address in Arizona. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2020, is newer than 45% of them.

  • NPI issued2020 · 45% of these records are older, 49% newer
  • In a Medicare fileNo · 3% of these records are
  • In the CMS Doctors and Clinicians fileYes · 5% of these records are
  • Graduated2024 · median 2015 among the 63 with a school on file
  • Record last updated2020 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101Y00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Counselor providers in Arizona

There are 1,161 counselor records in Arizona. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,161 in Arizona → Every provider in Phoenix → Counselor nationwide →

The 8 counselor records with the nearest ZIP codes

  1. Kimberly CloydPhoenix, AZ 850121518465087
  2. Cayla GenslerPhoenix, AZ 850121548725377
  3. Christine Hayes, MS, LPC CLLPhoenix, AZ 850121184164154
  4. Robert Holtsoi, LACPhoenix, AZ 850121780050823
  5. Richard IslesPhoenix, AZ 850121679071054
  6. Matthew Joyce, LPCPhoenix, AZ 850121013575166
  7. Daisy Mateo AntunaPhoenix, AZ 850121518333699
  8. Mihaela Nesic Karaselimovic, MC LPCPhoenix, AZ 850121558734426

Common questions

What is Mary Ann De Guzman, LCSW's NPI number?

Mary Ann De Guzman, LCSW's National Provider Identifier (NPI) is 1669011748, issued on Jan 6, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Mary Ann De Guzman, LCSW located?

The NPPES record lists a practice address at 650 E Indian School RD, Phoenix, AZ, 85012. Phone: (602) 277-5551. Providers update this record themselves, so call before visiting.

How can I verify Mary Ann De Guzman, LCSW's license?

NPPES lists Arizona license number 17508, as entered by the provider. Search the Arizona 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. 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.