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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ALLISON ELIZABETH RAJAN
NPI 1124778444
Obstetrics & Gynecology in San Diego, CA

Active since March 28, 2022PECOS Enrolled
200 W ARBOR DR, SAN DIEGO, CA 92103(800) 926-8273(888) 539-8781 Get Directions Write a Review

NPPES record last updated: September 17, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 17, 2026, Aug 19, 2026, May 27, 2026 (3 updates tracked since 2026).

About Allison Elizabeth Rajan NPPES

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

ALLISON ELIZABETH RAJAN (NPI 1124778444) is an individual obstetrics & gynecology provider in San Diego, California, licensed in California (188529) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, maintains 10 additional practice locations, and is a graduate of University Of Washington School Of Medicine (2022).

NPPES Registry Identity

NPI1124778444
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameALLISON ELIZABETH RAJAN
Location Address200 W ARBOR DRSan Diego, CA 92103-9000
Mailing AddressFile 57326Los Angeles, CA 90074-7326 · (800) 926-8273
Phone(800) 926-8273
Fax(888) 539-8781
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 2022
Enumeration DateMarch 28, 2022
Last NPPES UpdateSeptember 17, 20263 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2026
✔ NPI 1124778444 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in CA · 188529✔ Licensed in AK · 252360
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
200 W ARBOR DR, San Diego, CA 92103
Open in Google Maps ↗

Other Names 1

Former Name (1)Allison Elizabeth Hourigan

Secondary Practice Locations 10

Location 11650 Cowles StFairbanks, AK 99701-5907 · Phone (907) 458-2794 · Fax (907) 458-5180
Location 28910 Villa La Jolla DrLA Jolla, CA 92037-1701 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 316950 Via TazonSan Diego, CA 92127-1607 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 49300 Campus Point DrLA Jolla, CA 92037-1300 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 54168 Front StSan Diego, CA 92103-2030 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 66030 Village Way Ste 200San Diego, CA 92130-2973 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 74910 Directors PlSan Diego, CA 92121-3811 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 83750 Convoy St Ste 312San Diego, CA 92111-3741 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 91200 Garden View RdEncinitas, CA 92024-2477 · Phone (800) 926-8273 · Fax (888) 539-8781
Location 109333 Genesee AveSan Diego, CA 92121-2111 · Phone (800) 926-8273 · Fax (888) 539-8781

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allison Elizabeth Rajan is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7416413521
PECOS Enrollment IDI20260729002946
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

2

Medicare enrollment records show Allison Rajan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of California
Same address
Obstetrics & Gynecology
200 W ARBOR DR
San Diego, CA 92103
  • Reassigned Medicare billing, California enrollment
  • 171 clinicians in this Medicare group
NPI 1174626618 (800) 926-8273
Tanana Valley Clinic LLC
2,565 mi
Multi-Specialty
1001 NOBLE ST
Fairbanks, AK 99701
  • Reassigned Medicare billing, Alaska enrollment
  • 172 clinicians in this Medicare group
NPI 1922559558 (907) 459-3500

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 92103 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
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$76.87 typical visit price
range $20.62 – $151.42
Typical copayment $19.21 (range $5.15 – $37.85)
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 20

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

DR. RAMIN MOTARJEMI M.D.
Internal Medicine (Geriatric Medicine)
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (858) 249-2500
DR. KYLE PALMER EDMONDS M.D., FAAHPM
Hospice, Inpatient
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
SHAWN RAVEENTH VEDAMANI MD
Anesthesiology
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
DALE MICHAEL TRUJILLO NP
Nurse Practitioner
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
DR. EUGENE THOMAS RICHARDSON IV MD
Internal Medicine (Infectious Disease)
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
KAYLEE PETERSEN ARNP
Nurse Practitioner (Psychiatric/Mental Health)
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
IRENE NEVAREZ NP
Nurse Practitioner
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (800) 926-8273
WILLIAM JAMES MOSS M.D.
Student in an Organized Health Care Education/Training Program
200 W ARBOR DR
SAN DIEGO, CA 92103
San Diego County (508) 395-4189

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 Allison Rajan's NPI number?

The NPI number for Allison Rajan is 1124778444. It was assigned to this individual provider in the NPPES registry on March 28, 2022. The provider is also known as Allison Elizabeth Hourigan.

Where is Allison Rajan located?

Allison Rajan practices at 200 W Arbor Dr, San Diego, CA 92103. The listed phone number is (800) 926-8273.

What is Allison Rajan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Allison Rajan enrolled in Medicare?

Yes. Allison Rajan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Allison Rajan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allison Rajan reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (San Diego, CA) and Tanana Valley Clinic LLC (Fairbanks, AK). 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 Allison Rajan'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 Allison Rajan was last updated on September 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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.