Dr. Theodore Reldon Johnstone, MD
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 333 Mercy Avenue, Merced, CA 95340
- Practice phone
- Call (209) 564-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Johnstone's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Theodore Reldon Johnstone is a general practice physician in Merced, California
Dr. Johnstone practices at Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health.
Dr. Johnstone's NPI, 1487690608, was assigned on June 22, 2006. Dr. Johnstone holds California license A19140.
- NPI
- 1487690608NPI Registry (opens in a new tab)
- NPI enumeration date
- June 22, 2006
- NPI status
- Active
- Practice phone
- (209) 564-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Theodore Reldon Johnstone practices at Dignity Health - Mercy Medical Center in Merced, California
Dr. Johnstone's primary practice is Dignity Health - Mercy Medical Center, at 333 Mercy Avenue, Merced, CA 95340 in Merced County. The practice phone is (209) 564-5000.
- Dignity Health - Mercy Medical Center333 Mercy Avenue, Merced, CA 95340 · Merced CountyPhone(209) 564-5000
Source: Dmand AI Affiliation Data
Dr. Theodore Reldon Johnstone is affiliated with 3 sites of care
Dr. Johnstone's primary practice is Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health. Dmand AI also links Dr. Johnstone to 1 hospital outpatient department and 1 rural health clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Theodore Reldon Johnstone's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnstone practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Mercy Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Theodore Reldon Johnstone is one of 1,526 general practice physicians in California
General practice is Dr. Johnstone's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Johnstone is licensed in California.
Specialties and state licenses
- General practice, CaliforniaPrimary
General practice physicians near Dr. Johnstone
Counts of general practice physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Theodore Reldon Johnstone's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Johnstone's median patient age at 71, with 25% women.
Dr. Johnstone's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women25%
- Men75%
Source: Dmand AI Patient Panel Data
Sources for Dr. Theodore Reldon Johnstone's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Theodore Reldon Johnstone
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Theodore Reldon Johnstone's NPI number?
Dr. Theodore Reldon Johnstone's NPI number is 1487690608. It was assigned on June 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Theodore Reldon Johnstone?
Dr. Theodore Reldon Johnstone is a general practice physician in Merced, California. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Theodore Reldon Johnstone practice?
Dr. Johnstone practices at 333 Mercy Avenue, Merced, CA 95340. Dr. Johnstone's primary practice is Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health. Dmand AI also links Dr. Johnstone to 1 hospital outpatient department and 1 rural health clinic.
What is Dr. Theodore Reldon Johnstone's office phone number?
The practice phone on file for Dr. Johnstone is (209) 564-5000.
What is Dr. Theodore Reldon Johnstone's medical license number?
Dr. Johnstone holds California license A19140.
Which hospitals is Dr. Theodore Reldon Johnstone affiliated with?
Dr. Johnstone practices at Dignity Health - Mercy Medical Center in Merced, California.
How long has Dr. Theodore Reldon Johnstone been practicing?
Dr. Johnstone's NPI was assigned in 2006.
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