Dr. Michael I. Park, MD
- Part D claims, 2024
- 11,417
- Hospital affiliations
- 1
- Industry payments
- $162
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 1425 S Main Street, Walnut Creek, CA 94596
- Practice phone
- Call (925) 295-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Park's professional email, personal email and mobile number
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Dr. Michael I. Park is an internist in Walnut Creek, California
Dr. Park practices at Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente.
Dr. Park's NPI, 1598843690, was assigned on November 2, 2006. Dr. Park graduated from Albany Medical College in 1996. Dr. Park holds California license C51837.
- NPI
- 1598843690NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507882735
- NPI enumeration date
- November 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 295-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael I. Park practices at Walnut Creek Medical Center in Walnut Creek, California
Dr. Park's primary practice is Walnut Creek Medical Center, at 1425 S Main Street, Walnut Creek, CA 94596 in Contra Costa County. The practice phone is (925) 295-4000.
- Walnut Creek Medical Center1425 S Main Street, Walnut Creek, CA 94596 · Contra Costa CountyPhone(925) 295-4000
Source: Dmand AI Affiliation Data
Dr. Michael I. Park is affiliated with 1 site of care and 1 medical group
Dr. Park's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael I. Park's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Park practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael I. Park is one of 16,751 internists in California
Internal medicine is Dr. Park's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Park is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Park's licenses on file in 3 states: California, New Jersey and Pennsylvania.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- New Jersey license
- Pennsylvania license
Clinical focus
Dmand AI lists gastrointestinal bleeding among the conditions Dr. Park treats.
Internists near Dr. Park
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. Michael I. Park's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Park's median patient age at 69, with 41% women.
Dr. Park's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women41%
- Men59%
Source: Dmand AI Patient Panel Data
Dr. Michael I. Park wrote 11,417 Medicare Part D claims in 2024
In 2024, Dr. Park wrote 11,417 Medicare Part D claims for 1,406 patients. 92% of them were for generic drugs. CMS names the drug for 10,840 of them, across 122 drugs with 11 or more claims each, at $345,780 in total drug cost. In 2023, CMS named 9,689 claims across 122 drugs.
Dr. Park's Part D claims by kind of drug, 2024
- Generic10,455 claims92%
- Brand-name906 claims8%
- Other56 claims0%
Dr. Park'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. Park's Part D claims, 2024
- Opioids1%169 of 11,417 claims
- Antibiotics3%336 of 11,417 claims
- Antipsychotics, patients 65 and over0%30 of 11,417 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: 9,6892024: 10,84012%
Drugs named by CMS: 122 in 2024, 122 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
How Dr. Michael I. Park takes part in Medicare
Dr. Park accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael I. Park received $162 in industry payments from 2016 to 2017
CMS Open Payments shows 11 general payments to Dr. Park from 2 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $87.
General payments to Dr. Park by program year, 2016 to 2017
Companies that paid Dr. Park the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael I. Park has 1 award and honors on record
Dmand AI lists 1 award for Dr. Park, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Park
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Michael I. Park graduated from Albany Medical College
Dr. Park graduated from Albany Medical College in 1996.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael I. Park accepts plans from 2 insurance carriers
Dr. Park is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Park accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael I. Park'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Michael I. Park
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. Michael I. Park's NPI number?
Dr. Michael I. Park's NPI number is 1598843690. It was assigned on November 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael I. Park?
Dr. Michael I. Park is an internist in Walnut Creek, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael I. Park practice?
Dr. Park practices at 1425 S Main Street, Walnut Creek, CA 94596. Dr. Park's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente.
What is Dr. Michael I. Park's office phone number?
The practice phone on file for Dr. Park is (925) 295-4000.
What is Dr. Michael I. Park's medical license number?
Dr. Park holds California license C51837, one of the licenses on file in 3 states.
Which states has Dr. Michael I. Park been licensed in?
Dmand AI has state licenses on file for Dr. Park in California (2004 to 2026), New Jersey (1999 to 2011) and Pennsylvania (1997 to 2000).
Which hospitals is Dr. Michael I. Park affiliated with?
Dr. Park practices at Walnut Creek Medical Center in Walnut Creek, California.
What medical group is Dr. Michael I. Park part of?
Dr. Park is linked to The Permanente Medical Group, Inc.
Does Dr. Michael I. Park accept Medicare?
Yes. CMS lists Dr. Park as accepting Medicare assignment.
Is Dr. Michael I. Park board certified?
Yes. Dr. Park is board certified in internal medicine by the American Board of Internal Medicine.
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Where did Dr. Michael I. Park go to medical school?
Dr. Park graduated from Albany Medical College in 1996.
What drugs does Dr. Michael I. Park prescribe most?
In 2024 Medicare Part D data, Dr. Park's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Fluticasone Propionate.
Has Dr. Michael I. Park received payments from drug or device companies?
CMS Open Payments shows $162 in general payments to Dr. Park from 2 companies from 2016 to 2017. The largest total came from Allergan Inc.
How long has Dr. Michael I. Park been practicing?
Dr. Park graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Michael I. Park accept?
Dr. Park is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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