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AJAY PAL SINGH M.D.
NPI 1689830408
Psychiatry & Neurology - Psychiatry in Davis, CA

Active since July 31, 2008PECOS EnrolledAccepts Medicare Assignment
1590 DREW AVE STE 200, DAVIS, CA 95618(530) 297-7500(530) 297-7751 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 26, 2026, Mar 29, 2018, Oct 29, 2017 (3 updates tracked since 2017).

About Ajay Pal Singh M.d. NPPES

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

AJAY PAL SINGH M.D. (NPI 1689830408) is an individual psychiatry provider in Davis, California, licensed in California (A118490) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS and is a graduate of Other (1997).

NPPES Registry Identity

NPI1689830408
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameAJAY PAL SINGHCredential: M.D.
Location Address1590 DREW AVE STE 200Davis, CA 95618-7848
Mailing Address3835 N Freeway Blvd Ste 100Sacramento, CA 95834-1954 · (916) 576-7900 · Fax (916) 285-0338
Phone(530) 297-7500
Fax(530) 297-7751
Sole ProprietorNo
Medical School CMSOtherGraduated 1997
Enumeration DateJuly 31, 2008
Last NPPES UpdateJuly 1, 20263 updates tracked since enumeration
NPPES CertifiedJuly 1, 2026
✔ NPI 1689830408 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · A118490
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Also ListedPsychiatry & Neurology · Child & Adolescent PsychiatryTaxonomy 2084P0804X · License A118490 (CA)
1590 DREW AVE STE 200, Davis, CA 95618
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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

Ajay Pal Singh 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 ID9032368170
PECOS Enrollment IDI20121004000242
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 Reassignments

3

Medicare enrollment records show Ajay Pal Singh reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ajay Pal Singh MD Medical Inc
1.1 mi
Psychiatry
2840 5TH ST
Davis, CA 95618
  • Reassigned Medicare billing, California enrollment
NPI 1548192909 (669) 900-5721
Mark David Levine MD, Professional Corporation
1.7 mi
Psychiatry
1712 PICASSO AVE, SUITE D
Davis, CA 95618
  • Reassigned Medicare billing, California enrollment
  • 329 clinicians in this Medicare group
NPI 1689936569 (530) 297-7500
Permanente Medical Group Inc
40 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$180.85 typical visit price
range $60.44 – $180.85
Typical copayment $45.21 (range $15.11 – $45.21)
Most-billed visit code 99205
Established Patient
$75.03 typical visit price
range $19.88 – $148.15
Typical copayment $18.75 (range $4.97 – $37.03)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CATHERINE SCHUYLER BRENNAN MD
Psychiatry & Neurology (Psychiatry)
1590 DREW AVE STE 200
DAVIS, CA 95618
Yolo County (855) 501-1004
REBECCA ANN CURRIE LCSW
Social Worker (Clinical)
1590 DREW AVE STE 200
DAVIS, CA 95618
Yolo County (855) 501-1004
DR. LUKE REYNOLDS MICHELS M.D.
Psychiatry & Neurology (Psychiatry)
1590 DREW AVE STE 200
DAVIS, CA 95618
Yolo County (855) 501-1004
DR. BITA J. SHAGHAGHI D.O.
Psychiatry & Neurology (Psychiatry)
1590 DREW AVE STE 200
DAVIS, CA 95618
Yolo County (855) 501-1004

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 Ajay Pal Singh's NPI number?

The NPI number for Ajay Pal Singh is 1689830408. It was assigned to this individual provider in the NPPES registry on July 31, 2008.

Where is Ajay Pal Singh located?

Ajay Pal Singh practices at 1590 Drew Ave Ste 200, Davis, CA 95618. The listed phone number is (530) 297-7500.

What is Ajay Pal Singh's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Ajay Pal Singh enrolled in Medicare?

Yes. Ajay Pal Singh 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 organizations bill Medicare for Ajay Pal Singh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ajay Pal Singh reassigns Medicare benefits to 3 organizations: Ajay Pal Singh MD Medical Inc (Davis, CA), Mark David Levine MD, Professional Corporation (Davis, CA) and Permanente Medical Group Inc (Vallejo, CA). Each 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 Ajay Pal Singh'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 Ajay Pal Singh was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.