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TIGER VALLEY MEDICAL GROUP, INC
NPI 1144361171
Anesthesiology in Los Angeles, CA

Active since February 11, 2007
1711 W TEMPLE ST, LOS ANGELES, CA 90026(213) 989-6100 Get Directions Write a Review

NPPES record last updated: August 3, 2017. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Tiger Valley Medical Group, Inc NPPES

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

TIGER VALLEY MEDICAL GROUP, INC (NPI 1144361171) is a healthcare organization registered as an anesthesiology in Los Angeles, California and active in the NPI registry since February 2007. The organization lists Robin Chorn, President, as its authorized official.

NPPES Registry Identity

NPI1144361171
Entity TypeOrganization
Primary Taxonomy207L00000X
Legal Business NameTIGER VALLEY MEDICAL GROUP, INC
Location Address1711 W TEMPLE STLos Angeles, CA 90026-5421
Mailing AddressPo Box 5486Orange, CA 92863-5486 · (818) 550-0900 · Fax (505) 293-1524
Phone(213) 989-6100
Organization SubpartNo
Authorized OfficialRobin ChornPresident · (818) 550-0900
Enumeration DateFebruary 11, 2007
Last NPPES UpdateAugust 3, 2017
✔ NPI 1144361171 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
1711 W TEMPLE ST, Los Angeles, CA 90026
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Other Identifiers 3

OtherZZZ04655ZCA · Blue Shield
Medicare ID-Type UnspecifiedW15834CA
MedicaidGR0092830CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Tiger Valley Medical Group, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateCaliforniaEnrollment IDO20040609000878Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

11

Medicare enrollment records show 11 clinicians reassign Medicare billing to Tiger Valley Medical Group, Inc, which bills Medicare for the services they deliver. Of these, 5 practice at this address and 9 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 2

Anesthesiology6
Certified Registered Nurse Anesthetist (CRNA)5

Clinicians, nearest first (11)

John Groblewski, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1558312108
1711 W TEMPLE ST
Los Angeles, CA 90026
(213) 989-6100
✔ Accepts MedicareSame address
Robin Chorn, M.D.
Anesthesiology
NPI 1891712709
1711 W TEMPLE ST
Los Angeles, CA 90026
(818) 550-0900
✔ PECOSSame address
Christy Davis, CRNA, MSN
Certified Registered Nurse Anesthetist (CRNA)
NPI 1467644682
1711 W TEMPLE ST
Los Angeles, CA 90026
(213) 989-6100
✔ Accepts MedicareSame address
Timothy Hatcher, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1235182577
1711 W TEMPLE ST
Los Angeles, CA 90026
(213) 989-6129
Same address
Vartan Tarakchyan, M.D.
Anesthesiology
NPI 1508887720
1711 W TEMPLE ST
Los Angeles, CA 90026
(213) 989-6100
✔ PECOS✔ Accepts MedicareSame address
Karapet Dermendjian, M.D.
Anesthesiology
NPI 1326059452
1300 N VERMONT AVE
Los Angeles, CA 90027
(323) 663-4595
✔ PECOS2.5 mi
Alla Kryukova, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1639506322
1200 N STATE ST LA USC COUNTY MEDICAL CENTER
Los Angeles, CA 90033
(323) 226-2622
✔ Accepts Medicare3.2 mi
Daniel Sones, M.D.
Anesthesiology
NPI 1700811395
436 N BEDFORD DR #101
Beverly Hills, CA 90210
(310) 440-3131
✔ PECOS✔ Accepts Medicare8.1 mi
David Lassen, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1841542313
555 E HARDY ST
Inglewood, CA 90301
(310) 673-4660
✔ Accepts Medicare9.6 mi
Patience Keregha, M.D.
Anesthesiology
NPI 1417993890
9449 SAN FERNANDO RD
Sun Valley, CA 91352
(818) 767-3310
✔ PECOS✔ Accepts Medicare14 mi
Jonathan Mansour, D.O.
Anesthesiology
NPI 1245491943
14850 ROSCOE BLVD
Panorama City, CA 91402
(818) 787-2222
✔ PECOS✔ Accepts Medicare15 mi

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 Tiger Valley Medical Group, Inc's NPI number?

The NPI number for Tiger Valley Medical Group, Inc is 1144361171. It was assigned to this organization in the NPPES registry on February 11, 2007.

Where is Tiger Valley Medical Group, Inc located?

Tiger Valley Medical Group, Inc is located at 1711 W Temple St, Los Angeles, CA 90026. The listed phone number is (213) 989-6100.

What is Tiger Valley Medical Group, Inc's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Tiger Valley Medical Group, Inc enrolled in Medicare?

Yes. Tiger Valley Medical Group, Inc is registered in the Medicare PECOS enrollment system.

When is Tiger Valley Medical Group, Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Tiger Valley Medical Group, Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 11 clinicians in 2 Medicare specialties reassign their Medicare billing to Tiger Valley Medical Group, Inc. 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 Anesthesiology (6) and Certified Registered Nurse Anesthetist (CRNA) (5). Of these, 5 practice at this address and 9 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 Tiger Valley Medical Group, Inc was last updated on August 3, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.