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DR. JOHN LIN M.D.
NPI 1972558138
Internal Medicine - Critical Care Medicine in Valencia, CA

Active since May 24, 2006PECOS Enrolled
27055 ISLAND RD, VALENCIA, CA 91355(310) 623-0020(661) 670-0393 Get Directions Write a Review

NPPES record last updated: January 4, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. John Lin M.d. NPPES

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

DR. JOHN LIN M.D. (NPI 1972558138) is an individual critical care medicine provider in Valencia, California, licensed in California (A82618) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1972558138
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameDR. JOHN LINCredential: M.D.
Location Address27055 ISLAND RDValencia, CA 91355-1607
Mailing Address27055 Island RdValencia, CA 91355-1607 · (310) 623-0020 · Fax (661) 670-0393
Phone(310) 623-0020
Fax(661) 670-0393
Sole ProprietorNo
Enumeration DateMay 24, 2006
Last NPPES UpdateJanuary 4, 2011
✔ NPI 1972558138 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License✔ Licensed in CA · A82618
Definition
An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
27055 ISLAND RD, Valencia, CA 91355
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Other Identifiers 6

Medicare UPINI28272CA
Other00A826180CA · Caloptima
Other00A826180CA · Blue Shield
OtherA82618CA · Blue Cross
Medicaid00A826180CA
Medicare OSCAR/certificationWA82618BCA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. John Lin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

4

Medicare enrollment records show John Lin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inpatient Specialists Of California, PC
76 mi
Internal Medicine
2101 N WATERMAN AVE
San Bernardino, CA 92404
  • Reassigned Medicare billing, California enrollment
  • 1,216 clinicians in this Medicare group
NPI 1952792475 (615) 377-5658
Signify Health Medical Associates Of California, PC
316 mi
General Practice
505 MONTGOMERY ST, FL 10 & 11
San Francisco, CA 94111
  • Reassigned Medicare billing, California enrollment
  • 407 clinicians in this Medicare group
NPI 1124685169 (972) 715-3800
Riverton Physician Practices, LLC
807 mi
Emergency Medicine
1005 COLLEGE VIEW DR
Riverton, WY 82501
  • Reassigned Medicare billing, Wyoming enrollment
  • 54 clinicians in this Medicare group
NPI 1205875614 (307) 857-5280
Signify Health, LLC
1,253 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, New Mexico enrollment
  • 193 clinicians in this Medicare group
NPI 1689158487 (469) 466-7007

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 91355 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 John Lin's NPI number?

The NPI number for John Lin is 1972558138. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is John Lin located?

John Lin practices at 27055 Island Rd, Valencia, CA 91355. The listed phone number is (310) 623-0020.

What is John Lin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is John Lin enrolled in Medicare?

Yes. John Lin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Lin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Lin reassigns Medicare benefits to 4 organizations: Inpatient Specialists Of California, PC (San Bernardino, CA), Signify Health Medical Associates Of California, PC (San Francisco, CA), Riverton Physician Practices, LLC (Riverton, WY) and Signify Health, LLC (Dallas, TX). 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 John Lin'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 John Lin was last updated on January 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.