##### 



Exhibit 10.5.1
 THIRD AMENDMENT TO LEASE
(GR ONE  HEALTH GRADES EXPANSION)
  RECITALS
  Replacement Exhibit B
  Exhibit A Replacement Exhibit A Exhibit A
 Extension Options




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Right of First
Refusal
    Expansion Space Improvements
   2




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TENANT:
    
    LANDLORD:HEALTH GRADES, INC.,
a Delaware
corporation
    
    GR DEVELOPMENT ONE LLC, a Colorado limited
liability companyBy:
    
    
    
    By:
    
    GR Construction LLLP, a Colorado limited
liability limited partnership,
Its ManagerName:
    
    
    
    By:
    
    NDG I Management Inc., a Colorado corporation,
Its General PartnerTitle:
    
    
    
    By:Gregory C. Venn, Its President
  3




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STATE OF COLORADO
    
    
    ))
    
    
    ss.COUNTY OF ______________
    
    
    )
    
 STATE OF COLORADO
    
    
    ))
    
    
    ss.COUNTY OF ______________
    
    
    )
    
  4




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REPLACEMENT EXHIBIT A
BASE RENT SCHEDULE
 For Third Amendment to Lease Between
GR DEVELOPMENT ONE LLC, Landlord"
and
HEALTH GRADES, INC., Tenant"
 INITIAL SPACE
 RentableSquareFootage
    
    
    Base Rent per
    
    
    Annual Base
    
    
    Monthly BaseMonths
    
    (RSF)
    
    
    RSF
    
    
    Rent
    
    
    Rent1-3
    
    
    25,657
    
    
    $
    0.00
    
    
    $
    243,741.50
    
    
    $
    0.004-12
    
    
    25,657
    
    
    $
    9.50
    
    
    $
    243,741.50
    
    
    $
    20,311.793/1/06-12/31/06
    
    
    28,657
    
    
    $
    9.74
    
    
    $
    279,119.18
    
    
    $
    23,259.931/1/07-2/28/07
    
    
    28,657
    
    
    $
    9.74
    
    
    $
    279,119.18
    
    
    $
    23,259.933/1/07-2/28/08
    
    
    28,657
    
    
    $
    9.98
    
    
    $
    285,996.86
    
    
    $
    23,833.073/1/08-2/28/09
    
    
    28,657
    
    
    $
    10.23
    
    
    $
    293,161.11
    
    
    $
    24,430.093/1/09-2/28/10
    
    
    28,657
    
    
    $
    10.49
    
    
    $
    300,611.93
    
    
    $
    25,051.003/1/10-5/31/10
    
    
    28,657
    
    
    $
    10.75
    
    
    $
    308,062.75
    
    
    $
    25,671.906/1/10-12/31/10
    
    
    28,657
    
    
    $
    11.47
    
    
    $
    328,695.79
    
    
    $
    27.391.321/1/11-5/31/11
    
    
    28,657
    
    
    $
    11.82
    
    
    $
    338,725.74
    
    
    $
    28,227.25
 EXPANSION SPACE
 RentableSquareFootage
    
    
    Base rent per
    
    
    Annual Base
    
    
    Monthly BaseDates
    
    (RSF)
    
    
    RSF
    
    
    Rent
    
    
    Rent1/1/07-12/31/07
    
    
    7,228
    
    
    $
    10.50
    
    
    $
    75,894.00
    
    
    $
    6,324.501/1/08-12/31/08
    
    
    7,228
    
    
    $
    10.82
    
    
    $
    78,206.96
    
    
    $
    6,517.251/1/09-12/31/09
    
    
    7,228
    
    
    $
    11.14
    
    
    $
    80,519.91
    
    
    $
    6,710.001/1/10-12/31/10
    
    
    7,228
    
    
    $
    11.47
    
    
    $
    82,905.16
    
    
    $
    6,908.761/1/11-5/31/11
    
    
    7,288
    
    
    $
    11.82
    
    
    $
    85,434,96
    
    
    $
    7,119.58




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##### 



REPLACEMENT EXHIBIT B
PREMISES DEPICTION
 For Third Amendment to Lease Between
GR DEVELOPMENT ONE LLC, Landlord"
and
HEALTH GRADES, INC., Tenant"