Dr. John H. Hart Jr., MD
- Medicare services, 2024
- 548
- Medicare patients, 2024
- 226
- Part D claims, 2024
- 170
- MIPS score, 2024
- 98
- Hospital affiliations
- 5
- Practice address
- 347 Andrieux St, Sonoma, CA 95476
- Practice phone
- Call (707) 935-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hart'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. John H. Hart Jr. is an internist in Sonoma, California
Dr. Hart practices at Sonoma Valley Hospital in Sonoma, California, part of Sonoma Valley Hospital.
Dr. Hart's NPI, 1104904945, was assigned on November 1, 2006. Dr. Hart graduated from Meharry Medical College School of Medicine in 1993. Dr. Hart holds California license G81027.
- NPI
- 1104904945NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850441486
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 935-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John H. Hart Jr. practices at Sonoma Valley Hospital in Sonoma, California
Dr. Hart's primary practice is Sonoma Valley Hospital, at 347 Andrieux St, Sonoma, CA 95476 in Sonoma County. The practice phone is (707) 935-5000.
- Sonoma Valley Hospital347 Andrieux St, Sonoma, CA 95476 · Sonoma CountyPhone(707) 935-5000
Source: Dmand AI Affiliation Data
Dr. John H. Hart Jr. is affiliated with 5 sites of care and 2 medical groups
Dr. Hart's primary practice is Sonoma Valley Hospital in Sonoma, California, part of Sonoma Valley Hospital. Dr. Hart is also affiliated with Providence Santa Rosa Memorial Hospital. The medical group on file is SV Hospitalist Medical Group. Dmand AI also links Dr. Hart to 3 more hospitals and 1 medical group, 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. John H. Hart Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hart practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sonoma Valley Hospital | Available with a free account |
| +4 more sites and 1 medical group | 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 Sonoma Valley Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John H. Hart Jr. is one of 16,751 internists in California
Internal medicine is Dr. Hart's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hart is board certified in internal medicine by the American Board of Internal Medicine. Dr. Hart is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute respiratory failure, atrial fibrillation and flutter, cardiac arrhythmia, cellulitis, chronic diabetes, gastrointestinal obstruction, heart attack and kidney failure among the conditions Dr. Hart treats.
Internists near Dr. Hart
Counts of internists 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. John H. Hart Jr. billed Medicare for 548 services in 2024
CMS data shows 548 Medicare services from Dr. Hart across 5 procedure codes in 2024, for 226 Medicare patients. Medicare paid $52,281 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hart's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3132024: 54875%
Dr. Hart compared with the California median for internists, 2024
- Dr. Hart
- California median
- Medicare services
- 548vs 36152% above
- Medicare patients
- 226vs 15150% above
- Part D claims
- 68vs 42184% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Hart's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Hart?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hart and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John H. Hart Jr. treated 226 Medicare patients in 2024, average age 78
CMS counts 226 Medicare patients who saw Dr. Hart in 2024. The largest group is 75 to 84, with 90 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 40% are also on Medicaid. Their average risk score is 1.86, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hart's median patient age at 77, with 56% women.
Dr. Hart's Medicare patients by age, 2024
Dr. Hart's Medicare patients by sex, 2024
- Women13761%
- Men8939%
Chronic conditions among Dr. Hart's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis49%
- Mood disorders42%
- Anxiety41%
- Heart failure41%
- Depression38%
- Alzheimer's and dementia35%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hart's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John H. Hart Jr. wrote 170 Medicare Part D claims in 2024
In 2024, Dr. Hart wrote 170 Medicare Part D claims for 86 patients. 83% of them were for generic drugs. CMS names the drug for 68 of them, across 5 drugs with 11 or more claims each, at $466 in total drug cost. In 2023, CMS named 71 claims across 5 drugs.
Dr. Hart's Part D claims by kind of drug, 2024
- Generic141 claims83%
- Brand-name and other29 claims17%
Dr. Hart'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. Hart's Part D claims, 2024
- Antibiotics38%64 of 170 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: 712024: 684%
Drugs named by CMS: 5 in 2024, 5 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
Dr. John H. Hart Jr. scored 98 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Hart for performance year 2024, reported as part of a group. Dr. Hart accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Hart's MIPS scores, performance year 2024
- 98of 100Final score
- 40of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John H. Hart Jr. received $470 in industry payments from 2016 to 2025
CMS Open Payments shows 11 general payments to Dr. Hart from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $142.
General payments to Dr. Hart by program year, 2016 to 2025
Companies that paid Dr. Hart the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John H. Hart Jr. has 1 award and honors on record
Dmand AI lists 1 award for Dr. Hart, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Hart
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John H. Hart Jr. graduated from Meharry Medical College School of Medicine
Dr. Hart graduated from Meharry Medical College School of Medicine in 1993. Dr. Hart is a member of SHM.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John H. Hart Jr. accepts plans from 4 insurance carriers
Dr. Hart is in network with 4 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Hart accepts, by number of carriers
- Medicare3
- PPO3
- EPO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John H. Hart Jr.'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. John H. Hart Jr.
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. John H. Hart Jr.'s NPI number?
Dr. John H. Hart Jr.'s NPI number is 1104904945. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John H. Hart Jr.?
Dr. John H. Hart Jr. is an internist in Sonoma, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John H. Hart Jr. practice?
Dr. Hart practices at 347 Andrieux St, Sonoma, CA 95476. Dr. Hart's primary practice is Sonoma Valley Hospital in Sonoma, California, part of Sonoma Valley Hospital. Dmand AI also links Dr. Hart to 3 hospitals and 1 medical group.
What is Dr. John H. Hart Jr.'s office phone number?
The practice phone on file for Dr. Hart is (707) 935-5000.
What is Dr. John H. Hart Jr.'s medical license number?
Dr. Hart holds California license G81027.
Which hospitals is Dr. John H. Hart Jr. affiliated with?
Dr. Hart practices at Sonoma Valley Hospital in Sonoma, California. Dr. Hart is also affiliated with Providence Santa Rosa Memorial Hospital. Dmand AI links Dr. Hart to 3 more hospitals.
What medical group is Dr. John H. Hart Jr. part of?
Dr. Hart is linked to SV Hospitalist Medical Group. Dmand AI links Dr. Hart to 1 more medical group.
Does Dr. John H. Hart Jr. accept Medicare?
Yes. CMS data shows Dr. Hart billed Medicare for 548 services in 2024, and Dr. Hart accepts Medicare assignment.
What is Dr. John H. Hart Jr.'s MIPS score?
Dr. Hart's MIPS final score for performance year 2024 is 98 out of 100, reported as part of a group.
How many Medicare patients does Dr. John H. Hart Jr. see?
CMS counts 226 Medicare patients who saw Dr. Hart in 2024, with an average age of 78.
Show 7 more questionsShow fewer questions
Is Dr. John H. Hart Jr. board certified?
Yes. Dr. Hart is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John H. Hart Jr. bill to Medicare?
In 2024, Dr. Hart's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
Where did Dr. John H. Hart Jr. go to medical school?
Dr. Hart graduated from Meharry Medical College School of Medicine in 1993.
What drugs does Dr. John H. Hart Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Hart's most prescribed drugs by claims were Doxycycline Hyclate, Levofloxacin and Prednisone.
Has Dr. John H. Hart Jr. received payments from drug or device companies?
CMS Open Payments shows $470 in general payments to Dr. Hart from 7 companies from 2016 to 2025. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. John H. Hart Jr. been practicing?
Dr. Hart graduated from medical school in 1993, 33 years ago.
What insurance does Dr. John H. Hart Jr. accept?
Dr. Hart is in network with 4 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card