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Dr. Johnny C. Mao, MD
NPI1790992113
- Medicare services, 2016
- 39
- Part D claims, 2024
- 173
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $1,085
- Practice address
- 22 Bramhall St, Portland, ME 04102
- Practice phone
- Call (207) 662-0111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mao's professional email, personal email and mobile number
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Dr. Johnny C. Mao is an otolaryngologist in Portland, Maine
Dr. Mao practices at MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
Dr. Mao's NPI, 1790992113, was assigned on May 16, 2007. Dr. Mao graduated from Loma Linda University School Of Medicine in 2005. Dr. Mao holds Michigan license 4301085941.
NPI and contact details
- NPI
- 1790992113NPI Registry (opens in a new tab)
- NPI enumeration date
- May 16, 2007
- NPI status
- Active
- Practice phone
- (207) 662-0111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Johnny C. Mao practices at MaineHealth Maine Medical Center in Portland, Maine
Dr. Mao's primary practice is MaineHealth Maine Medical Center, at 22 Bramhall St, Portland, ME 04102 in Cumberland County. The practice phone is (207) 662-0111.
- MaineHealth Maine Medical Center22 Bramhall St, Portland, ME 04102 · Cumberland CountyPhone(207) 662-0111
Source: Dmand AI Affiliation Data
Dr. Johnny C. Mao is affiliated with 1 site of care
Dr. Mao's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Johnny C. Mao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mao practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MaineHealth Maine Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Johnny C. Mao is one of 52 otolaryngologists in Maine
Otolaryngology is Dr. Mao's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Mao is licensed in Michigan.
Specialties and state licenses
- Otolaryngology, MichiganPrimary
Otolaryngologists near Dr. Mao
Counts of otolaryngologists with a Dmand AI profile, by place and practice. Each opens the list.
52otolaryngologists in Maine
9otolaryngologists in Portland
5otolaryngologists at MaineHealth Maine Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Johnny C. Mao billed Medicare for 39 services in 2016
CMS data shows 39 Medicare services from Dr. Mao across 1 procedure code in 2016, all of them office visits. Medicare paid $2,749 for them. Every service was in an office.
Medicare services, 201639
Paid by Medicare$2,749
Procedure codes1
Dr. Mao compared with the Maine median for otolaryngologists, 2016
- Dr. Mao
- Maine median
- Medicare services
- 39vs 25885% below
- Part D claims
- 139vs 11422% above
Medians across 47 otolaryngologists in Maine with Dmand AI profiles that report each measure.
Dr. Mao's most billed Medicare procedure codes, 2016
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. Mao?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mao and other otolaryngologists in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Johnny C. Mao's patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Dr. Mao's median patient age at 52, with 65% women.
Dr. Mao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women65%
- Men35%
Source: Dmand AI Patient Panel Data
Dr. Johnny C. Mao wrote 173 Medicare Part D claims in 2024
In 2024, Dr. Mao wrote 173 Medicare Part D claims for 39 patients. 100% of them were for generic drugs. CMS names the drug for 139 of them, across 5 drugs with 11 or more claims each, at $585 in total drug cost. In 2023, CMS named 135 claims across 7 drugs.
Part D claims, 2024173
Drugs named by CMS5
Total drug cost$585
Part D patients39
Dr. Mao'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. Mao's Part D claims, 2024
- Opioids16%27 of 173 claims
- Antibiotics23%40 of 173 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: 1352024: 1393%
Drugs named by CMS: 5 in 2024, 7 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. Johnny C. Mao has 1 publication on record
Dmand AI links 1 paper to Dr. Mao in 2011.
Papers1
Recent publications by Dr. Mao
See who Dr. Mao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mao works with, so you can find a warm path to the right otolaryngologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Johnny C. Mao received $1,085 in industry payments from 2016 to 2025
CMS Open Payments shows 49 general payments to Dr. Mao from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $662.
General payments to Dr. Mao by program year, 2016 to 2025
Companies that paid Dr. Mao 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. Johnny C. Mao graduated from Loma Linda University School Of Medicine
Dr. Mao graduated from Loma Linda University School Of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Johnny C. Mao'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Johnny C. Mao
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. Johnny C. Mao's NPI number?
Dr. Johnny C. Mao's NPI number is 1790992113. It was assigned on May 16, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnny C. Mao?
Dr. Johnny C. Mao is an otolaryngologist in Portland, Maine. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Johnny C. Mao practice?
Dr. Mao practices at 22 Bramhall St, Portland, ME 04102. Dr. Mao's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
What is Dr. Johnny C. Mao's office phone number?
The practice phone on file for Dr. Mao is (207) 662-0111.
What is Dr. Johnny C. Mao's medical license number?
Dr. Mao holds Michigan license 4301085941.
Which hospitals is Dr. Johnny C. Mao affiliated with?
Dr. Mao practices at MaineHealth Maine Medical Center in Portland, Maine.
Does Dr. Johnny C. Mao accept Medicare?
Yes. CMS data shows Dr. Mao billed Medicare for 39 services in 2016.
What services does Dr. Johnny C. Mao bill to Medicare?
In 2016, Dr. Mao's most billed Medicare services were office visit, new patient (99203).
Where did Dr. Johnny C. Mao go to medical school?
Dr. Mao graduated from Loma Linda University School Of Medicine in 2005.
What drugs does Dr. Johnny C. Mao prescribe most?
In 2024 Medicare Part D data, Dr. Mao's most prescribed drugs by claims were Doxycycline Hyclate, Prednisone and Alprazolam.
Show 3 more questionsShow fewer questions
Has Dr. Johnny C. Mao received payments from drug or device companies?
CMS Open Payments shows $1,085 in general payments to Dr. Mao from 7 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Johnny C. Mao been practicing?
Dr. Mao graduated from medical school in 2005, 21 years ago.
Does Dr. Johnny C. Mao do research?
Dmand AI links 1 publication to Dr. Mao.
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