1. Home
  2. Directory
  3. California
  4. San Diego
  5. Hospitalist
  6. NPI Profile

DR. MATTHEW RUSSELL CALLAHAN M.D.
NPI 1083901839
Hospitalist in San Diego, CA

Active since June 30, 2011PECOS EnrolledAccepts Medicare Assignment
4077 FIFTH AVE, MER 127, SAN DIEGO, CA 92103(619) 260-7125(619) 686-3874 Get Directions Write a Review

NPPES record last updated: November 20, 2019. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Matthew Russell Callahan M.d. NPPES

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

DR. MATTHEW RUSSELL CALLAHAN M.D. (NPI 1083901839) is an individual hospitalist provider in San Diego, California, licensed in California (131315) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1083901839
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameDR. MATTHEW RUSSELL CALLAHANCredential: M.D.
Location Address4077 FIFTH AVE, MER 127San Diego, CA 92103-2105
Mailing Address10790 Rancho Bernardo RdSan Diego, CA 92127-5705 · (619) 260-7125 · Fax (619) 686-3874
Phone(619) 260-7125
Fax(619) 686-3874
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateJune 30, 2011
Last NPPES UpdateNovember 20, 2019
✔ NPI 1083901839 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in CA · 131315
Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedFamily MedicineTaxonomy 207Q00000X · License 131315 (CA)
4077 FIFTH AVE, San Diego, CA 92103
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Matthew Russell Callahan 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 ID547561136
PECOS Enrollment IDI20151228001071
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.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
227 services81 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
112 services54 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
73 services65 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
12 services12 patients

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
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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.

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.

BRIAN BUTLER M.D.
Hospitalist
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (619) 686-3935
DR. SCOT NOLAN DNP, RN, CNS
Clinical Nurse Specialist (Critical Care Medicine)
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (619) 686-3595
DR. ARASH ABIRI MD, PHD
Student in an Organized Health Care Education/Training Program
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (185) 883-2247
BRIANNA ELISE LIPSEY RN, BSN
Registered Nurse (Neuroscience)
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (858) 832-2478
PAUL JIN HAN M.D.
Internal Medicine
4077 FIFTH AVE, MER 35
SAN DIEGO, CA 92103
San Diego County (619) 260-7022
CHRISTIAN NGUYEN KELLY
Emergency Medicine
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (619) 294-8111
LINA MOHAMMED DO
Student in an Organized Health Care Education/Training Program
4077 FIFTH AVE
SAN DIEGO, CA 92103
San Diego County (619) 260-7220
AMY MARIE SANTOS CCRN, MSN, ACNP
Nurse Practitioner (Acute Care)
4077 FIFTH AVE, TRAUMA SERVICES, MER62
SAN DIEGO, CA 92103
San Diego County (619) 260-7285

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 Matthew Callahan's NPI number?

The NPI number for Matthew Callahan is 1083901839. It was assigned to this individual provider in the NPPES registry on June 30, 2011.

Where is Matthew Callahan located?

Matthew Callahan practices at 4077 Fifth Ave Mer 127, San Diego, CA 92103. The listed phone number is (619) 260-7125.

What is Matthew Callahan's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Matthew Callahan enrolled in Medicare?

Yes. Matthew Callahan 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.

When was this NPI record last updated?

The NPPES record for Matthew Callahan was last updated on November 20, 2019. NPI Profile syncs with the weekly NPPES data releases published by CMS.