Dr. Robert S. Gardner, MD
- Part D claims, 2024
- 847
- Hospital affiliations
- 1
- Industry payments
- $99
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 15630 18th Ave - Hwy 53, Clearlake, CA 95422
- Practice phone
- Call (707) 994-6486
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gardner'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. Robert S. Gardner is a psychiatrist in Clearlake, California
Dr. Gardner practices at Adventist Health Clear Lake in Clearlake, California, part of Adventist Health.
Dr. Gardner's NPI, 1023179850, was assigned on December 13, 2006. Dr. Gardner graduated from New York University School of Medicine in 1964. Dr. Gardner holds California license G17718.
- NPI
- 1023179850NPI Registry (opens in a new tab)
- NPI enumeration date
- December 13, 2006
- NPI status
- Active
- Practice phone
- (707) 994-6486
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1964
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Robert S. Gardner practices at Adventist Health Clear Lake in Clearlake, California
Dr. Gardner's primary practice is Adventist Health Clear Lake, at 15630 18th Ave - Hwy 53, Clearlake, CA 95422 in Lake County. The practice phone is (707) 994-6486.
- Adventist Health Clear Lake15630 18th Ave - Hwy 53, Clearlake, CA 95422 · Lake CountyPhone(707) 994-6486
Source: Dmand AI Affiliation Data
Dr. Robert S. Gardner is affiliated with 1 site of care
Dr. Gardner's primary practice is Adventist Health Clear Lake in Clearlake, California, part of Adventist Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert S. Gardner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gardner practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Adventist Health Clear Lake | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert S. Gardner is one of 6,803 psychiatrists in California
Psychiatry is Dr. Gardner's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Gardner is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Gardner's licenses on file in 2 states: California and Iowa.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Iowa license
Psychiatrists near Dr. Gardner
Counts of psychiatrists 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. Robert S. Gardner's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Gardner's median patient age at 56, with 80% women.
Dr. Gardner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women80%
- Men10%
Source: Dmand AI Patient Panel Data
Dr. Robert S. Gardner wrote 847 Medicare Part D claims in 2024
In 2024, Dr. Gardner wrote 847 Medicare Part D claims for 60 patients. 85% of them were for generic drugs. CMS names the drug for 697 of them, across 28 drugs with 11 or more claims each, at $74,949 in total drug cost. In 2023, CMS named 652 claims across 24 drugs.
Dr. Gardner's Part D claims by kind of drug, 2024
- Generic722 claims85%
- Brand-name and other125 claims15%
Dr. Gardner's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Gardner's Part D claims, 2024
- Antipsychotics, patients 65 and over14%118 of 847 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6522024: 6977%
Drugs named by CMS: 28 in 2024, 24 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Robert S. Gardner received $99 in industry payments from 2017 to 2023
CMS Open Payments shows 5 general payments to Dr. Gardner from 2 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 70% of the total. Abbvie Inc. paid the most, $52.
General payments to Dr. Gardner by program year, 2017 to 2023
General payments to Dr. Gardner by kind, 2017 to 2023
- Food and beverage$6970%
- Education$3030%
Companies that paid Dr. Gardner the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert S. Gardner has 1 award and honors on record
Dmand AI lists 1 award for Dr. Gardner, most recently Borden Award in 1964.
Awards and honors for Dr. Gardner
- 1964
- Borden Award
Source: Dmand AI Professional Profile Data
Dr. Robert S. Gardner graduated from New York University School of Medicine
Dr. Gardner graduated from New York University School of Medicine in 1964. Dr. Gardner is a member of ACP and American Hypnosis Society.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert S. Gardner'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Robert S. Gardner
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. Robert S. Gardner's NPI number?
Dr. Robert S. Gardner's NPI number is 1023179850. It was assigned on December 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert S. Gardner?
Dr. Robert S. Gardner is a psychiatrist in Clearlake, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Robert S. Gardner practice?
Dr. Gardner practices at 15630 18th Ave - Hwy 53, Clearlake, CA 95422. Dr. Gardner's primary practice is Adventist Health Clear Lake in Clearlake, California, part of Adventist Health.
What is Dr. Robert S. Gardner's office phone number?
The practice phone on file for Dr. Gardner is (707) 994-6486.
What is Dr. Robert S. Gardner's medical license number?
Dr. Gardner holds California license G17718, one of the licenses on file in 2 states.
Which states has Dr. Robert S. Gardner been licensed in?
Dmand AI has state licenses on file for Dr. Gardner in California (1969 to 2026) and Iowa (1972 to 1982).
Which hospitals is Dr. Robert S. Gardner affiliated with?
Dr. Gardner practices at Adventist Health Clear Lake in Clearlake, California.
Is Dr. Robert S. Gardner board certified?
Yes. Dr. Gardner is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Robert S. Gardner go to medical school?
Dr. Gardner graduated from New York University School of Medicine in 1964.
What drugs does Dr. Robert S. Gardner prescribe most?
In 2024 Medicare Part D data, Dr. Gardner's most prescribed drugs by claims were Levothyroxine Sodium, Aripiprazole and Lamotrigine.
Has Dr. Robert S. Gardner received payments from drug or device companies?
CMS Open Payments shows $99 in general payments to Dr. Gardner from 2 companies from 2017 to 2023. The largest total came from Abbvie Inc.
How long has Dr. Robert S. Gardner been practicing?
Dr. Gardner graduated from medical school in 1964, 62 years ago.
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