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DR. MARK YARWOOD JOHNSON M.D.
NPI 1861421372
Internal Medicine - Gastroenterology in Chula Vista, CA

Active since June 30, 2006PECOS Enrolled
480 4TH AVE, SUITE 506, CHULA VISTA, CA 91910(619) 585-0313(619) 585-0037 Get Directions Write a Review

NPPES record last updated: October 4, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Mark Yarwood Johnson M.d. NPPES

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

DR. MARK YARWOOD JOHNSON M.D. (NPI 1861421372) is an individual gastroenterology provider in Chula Vista, California, licensed in California (G28163) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861421372
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MARK YARWOOD JOHNSONCredential: M.D.
Location Address480 4TH AVE, SUITE 506Chula Vista, CA 91910-4410
Mailing Address65 Catspaw CpeCoronado, CA 92118-3221 · (619) 585-0313 · Fax (619) 585-0037
Phone(619) 585-0313
Fax(619) 585-0037
Sole ProprietorNo
Enumeration DateJune 30, 2006
Last NPPES UpdateOctober 4, 2007
✔ NPI 1861421372 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · G28163
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
480 4TH AVE, Chula Vista, CA 91910
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Other Identifiers 4

OtherA43635CA · Upin
Medicaid00G281630CA
Medicare PING28163CA
Other100001724CA · Medicare Railroad

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Yarwood Johnson 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.

Areas of Expertise CMS Part B claims 5

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 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
215 services60 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
59 services57 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
26 services26 patients
Diagnostic exam of large bowel using a flexible endoscope 45378
This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.
12 services12 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91910 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.

ADULT MEDICINE AND WELLNESS INC
Internal Medicine
480 4TH AVE, SUITE 516
CHULA VISTA, CA 91910
San Diego County (619) 476-9054
WILLIAM E. MONK, M.D., INC
Family Medicine
480 4TH AVE, SUITE 202
CHULA VISTA, CA 91910
San Diego County (619) 427-3361
VICTOR MORA D.D.S.
Dentist
480 4TH AVE, STE # 314
CHULA VISTA, CA 91910
San Diego County (619) 425-8060
KOUSAY A. AL-KOURAINY, M.D.
Clinical Medical Laboratory
480 4TH AVE, SUITE 409
CHULA VISTA, CA 91910
San Diego County (619) 425-2080
WILLIAM C EVES M D INC
Orthopaedic Surgery
480 4TH AVE, SUITE 307
CHULA VISTA, CA 91910
San Diego County (619) 426-3240
DR. JOHN J DUQUE M.D.
Internal Medicine (Gastroenterology)
480 4TH AVE, SUITE 316
CHULA VISTA, CA 91910
San Diego County (619) 691-0240
DANIEL GUPTILL
Physical Therapist
480 4TH AVE
CHULA VISTA, CA 91910
San Diego County (619) 409-3690
WESTERN PHARMACY GROUP LLC
Pharmacy (Community/Retail Pharmacy)
480 4TH AVE
CHULA VISTA, CA 91910
San Diego County (619) 427-1444

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 Mark Johnson's NPI number?

The NPI number for Mark Johnson is 1861421372. It was assigned to this individual provider in the NPPES registry on June 30, 2006.

Where is Mark Johnson located?

Mark Johnson practices at 480 4th Ave Suite 506, Chula Vista, CA 91910. The listed phone number is (619) 585-0313.

What is Mark Johnson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Mark Johnson enrolled in Medicare?

Yes. Mark Johnson is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mark Johnson was last updated on October 4, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.